Associations of clinical, psychological, and socioeconomic characteristics with nicotine dependence in smokers.

Cigarette smoking is a risk factor of mortality and morbidity from various cancerous, respiratory, and myocardial diseases. Nicotine dependence is assessed based on the degree of physical dependence. We aimed to determine the clinical, socioeconomic and psychological factors associated with the smoking status and degree of nicotine dependence of smokers. From April 2009 to September 2010, we retrospectively collected data from 17,577 subjects aged ≥ 18 years who had undergone a general health examination at a health promotion center. The instruments used included the Fagerström Tolerance Questionnaire (FTQ), Beck Depression Inventory (BDI), State-Trait Anxiety Inventory (STAI), Stress Response Inventory (SRI), and Alcohol Use Disorder Identification Test (AUDIT). Of the current smokers (N = 3946), 2345 (59%), 1154 (29%), and 447 (12%) had low, moderate, and high nicotine dependence, respectively. In multiple logistic analysis, predictors of high nicotine dependence were male sex (odds ratio [OR] 3.705, 95% confidence interval [CI] 1.997-6.945), older age (≥ 65 years) (OR 1.016, 95% CI 1.004-1.029), higher body mass index (BMI) (OR 1.048, 95% CI 1.018-1.078), diabetes (OR 1.870, 95% CI 1.251-2.794), single marital status (OR 1.575, 95% CI 1.186-2.092), lower education level (OR 1.887, 95% CI 1.463-2.433), and a higher stress level (OR 1.018, 95% CI 1.997-6.945). Thus, clinical, psychological, socioeconomic status including male, older age, higher BMI, diabetes, single marital status, lower education, and higher stress should be taken into consideration by promoting smoking cessation.