Baseline characteristics of the 151 smokers who participated in the support program at a worksite in Toyama, Japan, and the 2,166 smokers who did not participate in the study.

The data are presented for all the participating smokers and also grouped according to the Fagerström Test score for Nicotine Dependence at baseline. Values are expressed as mean ± standard deviation, or the % (number) of individuals in that category. a. An unpaired t test or a chi-square test was used to compare each factor between the participating and non-participating smokers. b. One-way analysis of variance, or a chi-square test was used to compare each factor among the three categories of the Fagerström Test score for Nicotine Dependence. c. A logistic regression model was used to test the significance of the linear trend for the association between Fagerström Test score for Nicotine Dependence (continuous variable) and each factor after adjustment for age. d. Hypertension was defined as a systolic blood pressure≥140 mmHg, diastolic blood pressure≥90 mmHg and/or taking medication for hypertension; hypercholesterolemia as a serum low-density lipoprotein cholesterol ≥3.62 mmol/l and/or taking medication for hypercholesterolemia; diabetes as a Japan Diabetes Society-HbA1c≥6.1 % (or the National Glycohemoglobin Standardization Program-HbA1c≥6.5 %) and/or taking medication for diabetes. e. A health problem was defined as any combination of the seven diseases listed above; a severe health problem as any combination of heart disease, stroke, cancer and/or chronic respiratory disease.