Faustine Devynck
Amélie Rousseau1
Lucia Romo- 1EA 4072 - PSITEC - Psychologie: Interaction, Temps, Emotions, Cognition, Université de Lille, Lille, France
- 2EA 4430-CLIPSYD, Université Paris Nanterre, Nanterre, France
- 3INSERM U1266, Institut de Psychiatrie et Neurosciences de Paris, Paris, France
Over the past 20 years, researchers have used various methodologies to assess different forms of repetitive negative thinking (RNT) and their influence on alcohol consumption. Contrasting results between clinical and general populations were observed. To summarize the current literature on RNT and alcohol use, a systematic review was conducted according to the Preferred Reporting for Systematic Review and Meta-Analysis (PRISMA) guidelines (Moher et al., 2009). Among the 27 included studies, the seven conducted among patients with alcohol use disorder (AUD) and the three focusing on other adult samples demonstrated a strong positive association between RNT and alcohol use or alcohol-related problems, regardless of the form of RNT. The results were more heterogeneous in the 17 studies conducted among adolescents and students, leading the authors to conclude that the results varied as a function of the severity of alcohol use. The results of this study suggest to focus on RNT from a transdiagnostic perspective in AUD. This processual approach may improve AUD treatment and relapse prevention. Finally, some gaps in the literature must be addressed: (1) the gender differences in the link between RNT and alcohol use and (2) the specific influence of RNT on alcohol use among young adults.
Introduction
Alcohol use problems may affect all categories of the population—men and women of any age group, nationality or socioeconomic status—sometimes leading to alcohol use disorder (AUD) (World Health Organization, 2014). Harmful alcohol consumption is included among the world's leading risk factors for morbidity, disability and mortality. Alcohol use causes approximately 3.3 million deaths each year (World Health Organization, 2014). Because it is a global societal problem, researchers aim to determine the factors associated with the development, maintenance and relapse of AUD to improve prevention and treatment. Some researchers interested in understanding drinking motives have focused on repetitive negative thinking (RNT) as one of these risk factors (Goldsmith et al., 2009; Smith and Book, 2010; Caselli et al., 2013; Bravo et al., 2017). Initially studied in the context of depression and generalized anxiety disorder (GAD), RNT could also be a major predictor of problem drinking (Nolen-Hoeksema and Harrell, 2002; Caselli et al., 2013). It is assumed that individuals may consume alcohol to regulate their RNT and the potentially associated negative mood (Goldsmith et al., 2009; Spada et al., 2013). This comprehensive and systematic review of the literature aims to synthesize results on the associations between RNT and alcohol use, different methodologies used, and differences regarding the gender, age or clinical vs. nonclinical status of the population.
From Worry and Rumination to Repetitive Negative Thinking
Worry refers to a “repetitive thoughts and images charged with negative affect relatively uncontrollable which lead to an attempt to engage in mental problem solving for which the outcome is uncertain but contains the possibility of one or more negative outcomes” (Borkovec et al., 1983, p. 9). This cognitive process is considered a central symptom in GAD (Borkovec et al., 1998). It shares many similarities with another repetitive and negative cognitive process: depressive rumination. Described as a response to sad mood involving repetitive and passive thinking about one's symptoms of depression and the possible causes and consequences of these symptoms (Nolen-Hoeksema et al., 2008), rumination was historically examined in the context of depressive disorder. Rumination and worry are both repetitive, relatively difficult to control, focused on negative content, abstract and verbal, increase negative mood and have an avoidance function (Stöber and Borkovec, 2002; Watkins, 2008). Rumination and worry differ mainly in their temporal orientation and content (rumination relates to past losses, whereas worry involves future threats). Because there are more similarities than differences across worry and rumination, Ehring and Watkins (2008) propose to study them jointly under the Repetitive Negative Thinking (RNT) label. RNT refers to a style of recurring, relatively uncontrollable and prolonged thoughts about one's current, past, or anticipated negative experiences (Ehring and Watkins, 2008). This mental process is shared across a wide range of psychological disorders, including substance use disorders, anxiety disorders, depression, eating disorders, pain disorders, and sleep disorders (Harvey et al., 2004), which is why RNT is defined as a transdiagnostic process (Harvey et al., 2004; Ehring and Watkins, 2008). This conceptualization of RNT is recent, and researchers traditionally focused on other forms of RNT distinguishable by their content but assimilable to RNT. Specific to social anxiety disorder (SAD), post-event processing (PEP) was defined as a process whereby individuals dwell on their performance in a past social situation (Clark and Wells, 1995). As depressive rumination, angry rumination involves passive and repetitive thinking but on anger-relevant themes, such as hostility and revenge. This specific form of rumination exacerbates hostile affect (Ciesla et al., 2011). Co-rumination refers to “extensively discussing and revisiting problems, speculating about problems and focusing on negative feelings” with others (Rose, 2002). It was associated with negative outcomes, such as emotional adjustment problems. Ciesla et al. (2011) considered co-rumination an interpersonal subtype of RNT in which the negative thoughts were vocalized among friends. Negative work rumination was defined as “preoccupation with and repetitive thoughts focused on negative work experiences that may extend beyond the workday” (Frone, 2015). Like other forms of rumination, negative work rumination prolongs exposure to the negative work experiences. Pfefferbaum et al. (2002) examined specific worry about safety referring to preoccupation about potential danger in the future and feelings of being safe. According to Ehring and Watkins (2008), these forms of thinking differ only in their content and can be considered transdiagnostic RNT. In line with this conceptualization, Watkins (2008) developed the Processing Mode Theory (PMT), suggesting a focus on the mode rather than on the content of RNT to explain negative vs. positive consequences. Two different modes of RNT lead to opposite consequences. The concrete-experiential mode of repetitive thinking (CET) refers to a functional cognitive process in which attention is focused on current experiences and emotions and details from the specific context. This CET mode is considered reflection associated with positive consequences, such as problem solving, whereas the abstract-analytic mode of repetitive thinking (AAT), characterized by abstract and evaluative thoughts related to causes and consequences of the mood, refers to a dysfunctional mode leading to negative consequences, such as increase in the negative mood (Watkins and Moulds, 2005; Watkins et al., 2009).
Current Review
To better understand why people drink alcohol, researchers' interest in the relationship between RNT and alcohol use has developed over the last 20 years. However, because the transdiagnostic approach considering all repetitive thinking subtypes as a unique cognitive process labeled RNT is recent, the literature is composed of various studies using different methodologies and tools to assess the relationship between worry or rumination or other RNT subtypes and alcohol use. Moreover, it is unclear whether this link differs between adolescents, university students, and adults from the general population and from the clinical population. Finally, because several foundational studies have demonstrated that rumination is more linked to depression in women than in men (Nolen-Hoeksema, 1987; Nolen-Hoeksema et al., 1999), it would be interesting to determine whether this gender difference may influence the relationship between RNT and alcohol consumption. To better understand the impact of RNT on alcohol consumption, this current systematic review aims to (1) identify all the RNT subtypes assessed and their impact on alcohol misuse; (2) enumerate the different methodologies and tools used in the included research; (3) determine whether the link between RNT and alcohol use depends on the gender, age category, or clinical vs. non-clinical status of participants; and (4) highlight the research gaps and future directions for researchers and clinicians.
Methods
The systematic review was conducted according to the Preferred Reporting for Systematic Review and Meta-Analysis (PRISMA) guidelines (Moher et al., 2009). A flow diagram of the search process is presented in Figure 1. Between July 2016 and December 2017, seven electronic databases were searched (PsycARTICLES, Psychology and Behavioral Sciences Collection, PsycINFO, Medline, Science Direct, Academic search premier, and ERIC) using the following keywords: (rumination OR worry OR post-event processing OR co-rumination OR “repetitive thinking” OR “repetitive thoughts”) AND (alcohol OR drinking). The results from these searches were combined in the reference management software Zotero version 4.0.29.15 (developed by the Center for History and New Media). Duplicates were removed, and 509 abstracts were screened. Studies were included according to the following inclusion criteria: (1) published international English language articles, (2) peer-reviewed articles, (3) measured repetitive thinking (including RNT, worry, rumination and other RNT subtypes) with a validated self-report questionnaire or with a modified version of those scales or using an ecological momentary assessment (EMA) tool or using an experimental procedure inducing RNT, and (4) measured alcohol consumption with a self-report questionnaire or with a modified version of those scales or with an EMA methodology or with an experimental procedure implying alcohol consumption. Studies were excluded using the following criteria: (1) did not examine the relationship between RNT and alcohol or alcohol-related problems, (2) case studies, (3) literature reviews, and (4) focused on motives for drinking (i.e., “to stop worrying” but did not measure worry). Ultimately, twenty-seven studies were included in the review.
Figure 1. Flow diagram of selection process.
Results
Summary of Target Population
Table 1 presents the characteristics of the 27 included studies. The target populations varied. University students, mostly taking psychology courses, were the most represented, with 11 studies focusing on them. The researchers were also very interested in adolescents (six studies) and patients with AUD (seven studies). Finally, two studies with adults from the general population and one with individuals experiencing post-traumatic stress symptoms were included in the review. The studies' sample sizes varied from 84 (Battista et al., 2014) to 30,851 (Page et al., 2011) for the general population. The studies' sample sizes varied from 36 (patients engaged in treatment for alcohol abuse in Caselli et al., 2008) to 1,398 (Boschloo et al., 2013) for the clinical population.
Table 1. Characteristics of the included studies (N = 27).
Summary of Alcohol Assessments/Induction Used
Different methods and tools were used to examine alcohol consumption. Nineteen studies used a self-report questionnaire to determine the alcohol consumption level or drinker status of the participants. The most popular was the Alcohol Use Disorder Identification Test (AUDIT; Saunders et al., 1993), which was used in six studies. Other authors used different tools with or without a self-report questionnaire. For example, Simons et al. (2016) used an EMA methodology to examine daily the dynamic link between alcohol consumption and rumination in the participants' environment. Six researchers did not use a validated questionnaire but rather questions to evaluate the quantity of alcohol commonly consumed by the participants [e.g., “How many drinks do you typically drink when you are engaged in alcohol use?” (Nichter and Chassin, 2015)]. A time frame was usually given (e.g., 1 month, 12 months). Four studies were based on symptom checklist questionnaires to determine the presence of alcohol abuse or alcohol dependence as specified in the Diagnostic and Statistical Manual of Mental Disorders (DSM). For example, Nolen-Hoeksema and Harrell (2002) and Smith and Book (2010) used the Structured Clinical Interview for DSM-IV-TR Axis I: Patient Edition (First et al., 2002). One study's protocol (Battista et al., 2014) used the Blood Alcohol Concentration (BAC), measuring the quantity of alcohol consumed in grams per 100 ml of blood and expressing this value as a percentage, used in association with the Subjective Intoxication Rating Form (Kushner et al., 1996). At each BAC assessment, the participants rated how intoxicated they felt with a mark along a line ranging from 0 (“I feel completely sober”) to 10 (“I feel more drunk than I have ever felt before”). Finally, four studies included in the current systematic review focused on other variables linked to alcohol consumption explaining the reasons why individuals may consume alcohol in response to RNT—e.g., four studies examined problems related to alcohol consumption using the Rutgers Alcohol Problem Index (White and Labouvie, 1989). Caselli et al. (2013) assessed the current craving level felt by the participants in response to a rumination vs. distraction induction on a visual analog scale (VAS) from 0 to 10.
Summary of RNT Assessments/Induction Used
The most commonly examined RNT is depressive rumination, assessed in 18 studies. Then, worry was measured eight times. Moreover, Pfefferbaum et al. (2002) specified that they examined worry about safety specifically. Wakeford et al. (2017) and Ciesla et al. (2011) also measured angry rumination and co-rumination. Work rumination was assessed by Frone (2015). Two studies focused on PEP. Finally, two studies examined abstract and concrete forms of RNT. All the different forms of RNT were assessed with self-reported questions.
In the anxiety context, the most used questionnaire was the Penn State Worry Questionnaire (Meyer et al., 1990) assessing trait-worry characteristics. Depressive rumination was the most often assessed using the Ruminative Responses Scale (RRS) of the Response Style Questionnaire (Nolen-Hoeksema and Morrow, 1991). The RSQ is a global measure examining the propensity to distract oneself or ruminate in response to a negative event. The 22-item self-report subscale, named the RRS, specifically assesses depressive rumination. Then, the RRS subscale was revised to construct a measure of rumination unconfounded with depression content, deleting items overlapping with items from measures of depressive symptomatologies. This step led to a shorter form of the scale named the RRS-Reconsidered (RRS-R; Treynor et al., 2003). This 10-item self-report questionnaire distinctly assesses reflection (e.g., “Go someplace alone to think about your feelings”) and brooding factors of rumination (e.g., “Think: What am I doing to deserve this?”). Hilt et al. (2015) used a modified version of the RRS-R adapted to the adolescent population. In this version, adolescents rated their habitual responses to feeling “upset” rather than “depressed.” Other self-reported questionnaires were used as the Rumination Reactivity subscale from the revised Leiden Index of Depressive Sensitivity (Van der Does, 2002) and the Rumination subscale from the Response to Stress Scale (Connor-Smith et al., 2000), evaluating the tendency to ruminate in response to negative life events. For the rumination-trait measure, Simons et al. (2016) used three items scored on a 5-point scale evaluating depressive rumination (e.g., “When people do something to make me sad, I don't forget about it”) and three items measuring anger rumination (e.g., “I often find myself thinking about things that have made me angry”). Some researchers did not use a validated questionnaire but rather their own questions to evaluate the depressive rumination as Simons et al. (2016). Aldridge-Gerry et al. (2011) asked participants daily on 5 consecutive days to first describe the most stressful event that they had experienced that current day. Second, they asked the participants to report how stressful they perceived the situation to be. Finally, the participants had to rate the extent to which they had used any specific strategies after the stressful event that they had just described. The coping strategies included depressive rumination assessed through four items. Finally, Caselli et al. (2013) applied a rumination induction task (Nolen-Hoeksema and Morrow, 1991). Participants received the instruction to focus their attention on 45 items that were symptom-focused (e.g., “Think about what your feelings might mean”), emotion-focused (e.g., “Think about how happy or sad you feel”), and self-focused (e.g., “Think about why you feel the way you do”) for a total of 8 min. No state-rumination assessment was used to evaluate the rumination induction efficacy.
Summary of Main Findings
Of the 27 studies included, 20 demonstrated a significant positive link between alcohol consumption and some RNT, two showed a significant negative link, three found no significant link, two revealed different results regarding gender or the RNT subtype.
In Patients With Alcohol Use Disorder
The five studies focusing on depressive rumination among patients with AUD revealed a positive association between depressive rumination and alcohol consumption (Caselli et al., 2008, 2013; Boschloo et al., 2013; Devynck et al., 2016). The three studies focusing on worry and alcohol consumption among AUD participants revealed a significant positive association (Smith and Book, 2010; Boschloo et al., 2013; Devynck et al., 2016). Finally, the two studies assessing abstract-analytic thinking (AAT) and concrete-experiential thinking (CET) in alcohol-dependent patients demonstrated a positive association between abstract-analytic processing and alcohol dependence and a negative association between concrete-experiential processing and alcohol dependence (Devynck et al., 2016; Grynberg et al., 2016).
In Adolescents From the General Population
Among the six included studies with adolescents, the results were more inconsistent and revealed differences across gender. Regarding depressive rumination, Hilt et al. (2015) suggested that it was associated with alcohol use for adolescents who reported having more friends who used alcohol and that the detrimental effect of exposure to friends who drank was equal for boys and girls who ruminated. Willem et al. (2011) demonstrated that adolescents with higher levels of ruminative brooding had more substance use-related problems. Moreover, a high ruminative brooding level and low ruminative reflection level predicted problematic alcohol use, regardless of depression. Nevertheless, the results suggested that ruminative reflection may play a protective role against substance use problems only among boys. Willem et al. (2014) showed that a substance use problem predicted increases in both ruminative brooding and reflection only among girls but that higher levels of brooding predicted a decrease in alcohol use. This last effect emerged independently of gender. One study showed that adolescents who ruminated following a stressful event reported an increase in substance misuse in response to elevations in negative life events. Finally, in an exploratory survey among adolescents from the Philippines, China, Chile, and Namibia, participants who had consumed alcohol in the last 30 days reported higher levels of worry than adolescents who had not drunk. The authors did not find a difference between boys and girls (Page et al., 2011). Conversely, Nichter and Chassin (2015) revealed a negative link between worry and different alcohol use outcomes (risk of typical alcohol involvement, frequency of binge drinking, and alcohol dependence symptoms). Similarly, Adrian et al. (2014) did not show a significant link between either brooding or the reflection factor of depressive rumination and alcohol use in adolescents. Nevertheless, the authors explained that increased ruminative reflection predicted the absence of AUD and would be an effective strategy to prevent AUD. The results did not significantly differ between boys and girls.
In University Student From General Population
Results in university students are also contradictory and need to be replicated. Battista et al. (2014) showed that socially anxious women were less engaged in PEP some days after drinking alcohol at the time of the social interaction than women who did not drink alcohol at the time of the interaction with other people. The result was the opposite for men as those who had consumed alcohol at the time of the social interaction were more engaged in PEP than socially anxious men who did not consume alcohol at the time of the social interaction. This result was consistent with a previous (Battista and Kocovski, 2010) study that demonstrated that alcohol use better predicted the PEP level than the traits social anxiety and depression. Although Wakeford et al. (2017) did not find a significant relationship between angry rumination and alcohol use, Ciesla et al. (2011) showed a positive link between these variables. This link was not moderated by gender and remained significant even after controlling for hostile affect. Conversely, the positive significant association between co-rumination and alcohol use differed across gender: women demonstrated a positive association between level of co-rumination and weekly drinking, whereas higher levels of co-rumination were not significantly associated with alcohol use among men. Skitch and Abela (2008) showed that rumination in response to stress predicted both depressive symptoms and substance use problems in adolescents and that the relationship between a negative life event and both depressive symptoms and substance misuse varied as a function of the level of rumination. The authors did not find a gender influence on both these relationships but revealed that girls reported more rumination in response to stress than boys. Two studies were conducted with daily reporting of alcohol use. First, university students who engaged in more rumination and minimization of stressors tended to use alcohol more in response to stressful events (Aldridge-Gerry et al., 2011). Second, the results obtained with an EMA demonstrated that in university students, rumination was positively linked to alcohol dependence. Specifically, the negative reinforcement effect of drinking on persistence of affective states resulting from rumination was only observed among girls (Simons et al., 2016). A positive relationship between rumination and alcohol use was also find in Bravo et al. (2018)'s study. Winkeljohn Black et al. (2017) demonstrated that negative consequences of alcohol use were associated to rumination but did not examine the link between rumination and alcohol consumption. Finally, in Ciesla et al. (2011), the tested association between depressive rumination and alcohol use was not significant, and there was no effect of gender. Surprisingly, worry negatively predicted alcohol consumption such that higher levels of worry were linked to less weekly alcohol use in both men and women. In Kelly et al. (2005), university students showing higher scores of worry reported significantly less alcohol consumption than students with low scores of worry. Finally, Goldstein (2006) found no significant link between depressive rumination and alcohol use among female and male.
In Other Samples
In a sample from the general population, Nolen-Hoeksema and Harrell (2002) demonstrated that both men and women who ruminated were more likely to engage in alcohol use to cope. Moreover, though both men and women engaging in drinking to cope reported more alcohol-related problems, this link was stronger for women. Another study conducted in adult workers from the general population revealed that negative rumination related to work was positively associated with heavy alcohol use, workday alcohol use, and after-work alcohol use (Frone, 2015). Finally, one study focusing on participants interviewed 6 months after the 1995 Oklahoma City bombing revealed that alcohol use increased in participants who worried about safety after the traumatic event (Pfefferbaum et al., 2002).
Discussion
The aim of the present systematic review was to synthetize the methods used and results observed in the current literature on RNT and alcohol use.
Summary of Evidence in the Clinical Population
All the studies conducted in patients with AUD considered in this review demonstrated that all the forms of RNT assessed (i.e., depressive rumination, ruminative brooding, ruminative reflection, worry, and abstract-analytic thinking) predicted alcohol use, regardless of the method used (i.e., cross-sectional or quasi-experimental). The current review provides strong support for focusing on a single process labeled RNT. The different forms of RNT considered in the current literature lead to the same negative consequence of alcohol misuse. Nevertheless, it seems necessary to note that the participants with comorbid AUD and GAD reported higher levels of worry and higher levels of belief that alcohol reduces worry than AUD participants without comorbidity (Smith and Book, 2010). Moreover, Caselli et al. (2008) suggested that rumination mediated the link between depression and alcohol use, whereas Devynck et al. (2016) considered that depressive and anxiety symptoms mediated the link between RNT and alcohol consumption. Even if the results about the role of depression and anxiety symptoms in the link between RNT and alcohol consumption are not unanimous, it is clear that the transdiagnostic approach permits accounting for comorbid disorders. This assumption is also underpinned by the positive link observed between worry and alcohol use in individuals experiencing post-traumatic stress symptoms (Pfefferbaum et al., 2002).
Indeed, because RNT plays a role in the development and maintenance of AUD and comorbid emotional disorders, the Rumination-Focused Cognitive-Behavioral Therapy (RFCBT) developed by Watkins (Watkins, 2016) to decrease dysfunctional rumination and improve functional rumination in depression symptoms may be adapted to AUD, minimizing the severity of the disorder and relapse. Evaluated in patients with depressive disorder, RFCBT led to improvements in depressive symptoms, rumination and comorbid disorders (Watkins et al., 2007, 2011), suggesting promising advances in AUD care.
Despite the unanimous results regarding RNT in AUD observed in the current review, researchers had to address some persistent questions, notably about the role of gender in the link between RNT and alcohol use. No studies included in this review have examined this issue, whereas literature on depression strongly showed that rumination was more linked to depression in women than in men (Nolen-Hoeksema, 1987; Nolen-Hoeksema et al., 1999). Moreover, results in non-clinical population suggest that the link between RNT and alcohol use is not the same between men and women. The role of gender in alcohol use in response to RNT among AUD patients need to be address. Second, only one quasi-experimental study using rumination induction was conducted to highlight that rumination predicted craving in AUD (Caselli et al., 2013), and this study did not use an experimental check to control the efficacy of rumination induction. Future experimental studies are needed to confirm the causal role of RNT in craving and alcohol use. Primarily, EMA will allow more ecological assessment of the variations in the dynamic links between RNT and alcohol use among patients with AUD in their natural environment. Indeed, 23 studies included in the current review adopted a cross-sectional design. The literature needs more studies using experimental design or EMA to draw strong conclusions. Because RNT and alcohol use are variables and dynamic behaviors, largely influenced by the context, EMA seems to provide an optimal approach to address these questions (Serre et al., 2015).
Summary of Evidence in the General Population
The findings of the 17 studies conducted in adolescents and undergraduate students are more contradictory and invite more questions than they provide answers. First, the question about the role of gender in the link between RNT and alcohol use was not clearly answered. Some studies did not show significant differences between men and women (Goldstein, 2006; Skitch and Abela, 2008; Page et al., 2011; Adrian et al., 2014; Hilt et al., 2015), while others tended to suggest that women are more at risk of drinking alcohol to cope with RNT. For example, PEP and co-rumination seem to predict alcohol use among girls but not boys (Ciesla et al., 2011; Battista et al., 2014). With EMA, Simons et al. (2016) demonstrated that depressive rumination predicted AUD symptoms in undergraduate university students. Furthermore, the negative reinforcement effect of alcohol use on persistence of negative mood resulting from rumination was only observed among girls. This finding suggests that women are more motivated to drink to interrupt negative mood resulting from rumination. Consistently, Willem et al. (2011) found that ruminative brooding predicted problematic alcohol use and that ruminative reflection predicted alcohol misuse. Nevertheless, ruminative reflection was only protective against substance use-related problems among boys, suggesting that girls are more vulnerable to rumination regardless of the mode of thinking. Accordingly, Skitch and Abela (2008) showed that girls ruminated more than boys. In view of these divergent results, it appears impossible to draw any conclusions about the gender difference, and this question requires more studies and replications in the future.
Furthermore, though some results suggested that depressive rumination predicts alcohol use in young people from the general population, other authors found contradictory results, such as Willem et al. (2014), who surprisingly found that higher levels of brooding predicted decreases in alcohol use among boys and girls. A negative link was also found in three studies focusing on worry and alcohol use in adolescents and university students (Kelly et al., 2005; Ciesla et al., 2011; Nichter and Chassin, 2015). These results may be first explained by the severity of alcohol use (Ciesla et al., 2011; Willem et al., 2014). RNT may especially predict alcohol use in clinical populations, explaining why results are as so contrasting in the general population. This hypothesis was supported by the Caselli et al. (2013)'s results which demonstrated that an induction of rumination increased craving only among patients suffering from an AUD but not in the general population. It is possible that young adults subjected to stressful life events during their teenage or university years and who still have control over their alcohol consumption avoid drinking, preferring abstinence to maintain a feeling of control over stressful life events. In contrast, individuals experiencing AUD and then dysregulation of alcohol consumption develop a restricted behavioral register to cope with negative affect resulting from RNT. Patients with AUD may drink alcohol to cope, whereas individuals with controlled consumption may prefer a coping strategy promoting an appearance or feeling of competence. Indeed, Kelly et al. (2005) and Nichter and Chassin (2015) postulated that individuals who worry about their self-perceived or other-perceived image of competence may drink alcohol less frequently. Because drinking alcohol in large quantities promotes an appearance of incompetence, some young adults concerned about their appearance may avoid drinking (Mäkelä and Mustonen, 2000; Fisher and Harrison, 2012). Moreover, Ciesla et al. (2011) reported that assessing the frequency of alcohol use differs from determining the presence of AUD. Indeed, the link between RNT and alcohol use can be distinguished from the link between RNT and the consequences of alcohol use. Accordingly, different results were found by Willem et al. (2011, 2014) as a function of alcohol use or alcohol-related problems assessed. As a result of these heterogeneous results, no definitive conclusion can be drawn about the impact of RNT on alcohol use in teenagers and university students. The authors themselves declared that their results should be interpreted with caution due to missing data analyses revealing inequalities between their three measurement waves (Willem et al., 2014).
In conclusion, studies in adolescents and university students reported heterogeneous results and need to be replicated. While the majority of studies on rumination demonstrated a positive link to alcohol use, only one study on worry reported this positive link. Future studies must determine what forms of RNT are involved in alcohol use among adolescents and university students and whether it is possible to apply to them the processual approach of RNT. Until now, it seems difficult to determine the relevance of focusing on a single RNT process in this population. It may be interesting to deepen the theory postulating that the link between RNT and alcohol use varies as a function of the severity of alcohol use and to examine whether perfectionism or concerns about performance and appearance may influence the link between worry and alcohol use in university students and adolescents. Understanding more specifically what factors influence this link will help improve program to prevent alcohol abuse.
Limitations
The results of the first systematic review focusing on the association between RNT and alcohol use should be interpreted taking into account some limitations. First, we aim to identify and describe each published study according to a validated methodology to create a theoretical overview of the impact of RNT on alcohol use. Nevertheless, our methodology does not determine the effect size of the phenomenon. Second, although we have followed a strong methodology, it remains possible that we have missed some studies. Moreover, the potential publication bias implying a tendency to publish studies with significant results or only significant models without fully exploring the data may have influenced the literature considered in the current review. Third, it seems also necessary to underline that considering the small number of studies published on RNT and alcohol use, we considered research completed with heterogeneous alcohol measures (e.g., self-reported questionnaire or Blood Alcohol Concentration) and other variables as negative consequences of the alcohol consumption, corresponding to different outcomes. Even if the alcohol use was assessed among all the studies included, we also reported and discuss some results linked to other variables because it provided some additional information. Finally, the majority of the studies included were conducted following a cross-sectional methodology. Consequently, the results should be replicated through methodologies for establishing causal links.
Conclusions
Although the literature requires more replication and experimental studies to draw precise conclusions on the link between RNT and alcohol use, this first systematic review provides preliminary evidence that RNT predicts alcohol use in patients with AUD, who could benefit from RNT-focused programmes. It also suggests eliminating the wide range of RNT subtypes to focus on a single process in a transdiagnostic approach. With respect to individuals from the general population, future studies will enable a better understanding of what type of RNT is involved in alcohol consumption, whether gender plays a significant role and finally whether drinking alcohol to cope with RNT varies as a function of a clinical vs. non-clinical status.
Data Availability
All datasets analyzed for this study are included in the manuscript and the supplementary files.
Ethics Statement
This article does not contain any studies with human participants or animals performed by any of the authors.
Author Contributions
All the authors developed the method and searched databases for the review. FD conducted literature searches, provided summaries of previous research, and drafted the article. All the authors contributed and approved the final manuscript.
Funding
This study was funded by the Institute for Scientific Research on Drinking (IREB—grant number 2015/6) and the Foundation for Alcohol Research (FRA—grant number 2016/21). These foundations did not exert any editorial direction or censorship over any part of this manuscript. FD was funded by the Regional Council of the Hauts-de-France and the European Metropol of Lille. This work was supported by the Foundation for Alcohol Research (FRA—grant number 2016/21). The article processing fee were funding by the Young researcher Prize from the Regional Council of the Hauts-de-France and the PSITEC Lab.
Conflict of Interest Statement
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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Keywords: alcohol, repetitive negative thinking, rumination, worry, systematic review
Citation: Devynck F, Rousseau A and Romo L (2019) Does Repetitive Negative Thinking Influence Alcohol Use? A Systematic Review of the Literature. Front. Psychol. 10:1482. doi: 10.3389/fpsyg.2019.01482
Received: 16 April 2019; Accepted: 11 June 2019;
Published: 03 July 2019.
Edited by:
Francisco J. Ruiz, Fundación Universitaria Konrad Lorenz, ColombiaReviewed by:
Marcantonio M. Spada, London South Bank University, United KingdomMichael Bordieri, Murray State University, United States
Copyright © 2019 Devynck, Rousseau and Romo. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Faustine Devynck, faustinedevynck@gmail.com