Fig 2. Number of cigarettes/day during quit attempt weeks.

Self-reported number of smoked cigarettes per day for 7 days at baseline (black bars), during the quit attempt week taking gemfibrozil (pattern bars) and during the quit attempt week taking placebo (grey bars). After comparing the effects of both treatments using a linear mixed model, the number of smoked cigarettes/day was significantly higher during baseline compared to both treatments (< 0.001). No significant difference was detected between gemfibrozil and placebo groups.