Severity of withdrawal symptomatology in follicular versus luteal quitters: The combined effects of menstrual phase and withdrawal on smoking cessation outcome.

Women are at an increased risk of relapse after a smoking cessation attempt. While the reasons for this phenomenon are not fully understood, recent research indicates that both the menstrual cycle and negative symptomatology may play a role. The goal of this study was to describe the association between withdrawal symptoms during attempted smoking cessation, and to investigate the impact of these symptoms on smoking cessation outcomes as defined by 7-day point prevalence at 14 and 30 days. Negative symptoms associated with the premenstrual period were also assessed. Participants (n = 202) were 29.8 (SD +/- 6.6) years old and smoked 16.6 (SD +/- 5.6) cigarettes per day. They were randomly assigned to quit smoking in the follicular (n = 106) or luteal (n = 96) menstrual phase. We observed several significantly more severe premenstrual and withdrawal symptoms in the luteal phase. Regardless of quit phase, most withdrawal symptoms were associated with an increased risk of relapse at 14 and 30 days post quit date. Participants attempting to quit smoking in the follicular phase who had higher levels of Anger and Craving were more likely to relapse to smoking at 14-days (OR = 2.00, p-value = 0.026; OR = 2.63, p-value = 0.006; respectively). These data suggest that the menstrual cycle may play a role in smoking cessation outcome, as well as in the symptomatology experienced during a cessation attempt.