Obsessive-compulsive symptoms and cigarette smoking: an initial cross-sectional test of mechanisms of co-occurrence

Global prevalence of smoking among individuals with obsessive-compulsive disorder and symptoms: a systematic review and meta-analysis

Disease from nicotine dependency continues to be a leading cause of preventable death worldwide, and therefore research that elucidates potential correlates of tobacco use may facilitate the advancement of research, clinical practice, and policy in this area to target this public health challenge. One potential tobacco use correlate is obsessive-compulsive disorder (OCD) phenomena. The growing research evidence on the association between tobacco use and OCD phenomena is mixed, making it difficult to synthesize extant findings into meaningful conclusions. Indeed, there has never been a systematic review or meta-analysis of this area of research. To this end, a systematic review was carried out with studies between 1988 and 2021, and from this review, 71 independent estimations (n = 10,475; Females = 51.95%; mean age = 37.29, SD = 13.78) were extracted for meta-analysis. We found that about three in ten participants with OCD are likely to use tobacco, which is higher than the general population. The prevalence was the same among OCD participants at all levels (those with symptomology but no confirmed diagnosis, those surpassing a clinical cutoff for OCD but no confirmed diagnosis, and those with a confirmed OCD diagnosis). The results also indicated considerable variability across study results and a wide confidence interval associated with the tobacco use prevalence rate among those with OCD phenomena. The findings provide support for continued study of this comorbidity, perhaps with longitudinal and experimental designs to test for reciprocal associations between tobacco use and OCD phenomena in the service of targeting nicotine dependence as a substantial global public health concern.

Comorbidity of obsessive-compulsive disorder and symptoms with nicotine dependence: Observational epidemiologic evidence from US-representative and psychiatric outpatient population-based samples

Despite emerging evidence linking obsessive-compulsive disorder and symptoms (OCS) and nicotine dependence (ND), this comorbidity has received little research. To address this, the current investigation highlights evidence of this comorbidity in two epidemiologic datasets: (1) US nationally-representative survey (i.e., National Comorbidity Study-Replication; NCS-R), and (2) a psychiatric clinical epidemiology dataset (i.e., the Methods to Improve Diagnostic Assessment and Services; MIDAS). For NCS-R (n = 2088), interviews were carried as part of extensive data collection, including OCS symptom count and ND diagnosis. For MIDAS (n = 1257), as part of receiving mental health services at a US hospital outpatient treatment program, participants received diagnostic interviews, including evaluation of ND and obsessive-compulsive disorder (OCD), with OCS being characterized by self-reported symptom count. Results from NCS-R indicate that rates of current ND increased from 3.1% to 10.8% as OCS symptom count increased. Results from the MIDAS clinical sample exhibited a similar trend, but with higher overall figures compared to the US-representative NCS-R sample, with rates of current ND increasing from 18.3% to 41.4% as OCS count increased. In both datasets, OCS was positively associated with current (but not prior) ND after adjusting for psychiatric and sociodemographic covariates. For MIDAS, after adjusting for covariates, OCD diagnostic status was not associated with ND. Findings from this study lend support for the OCS-ND comorbidity in clinical and non-clinical populations and suggests that the OCS-ND link may be obscured when obsessive-compulsive phenomena is modeled as a dichotomous diagnostic variable versus as a dimensional construct.