Figure 1.

Multivariate adjusted HRs for type 2 diabetes according to adult secondhand smoke exposure (P = 0.008 for trend). Error bars indicate 95% CIs. Secondhand smoke was calculated by summing exposure at home and outside the home and adjusted for parental history of diabetes, education, body silhouette at age 8, childhood secondhand smoke exposure, hormone replacement therapy (premenopausal, ever, never), treated hypertension and hypercholesterolemia, and BMI (continuous) and for physical activity measured in METs per week (quartiles), total energy in kilocalories per day (quartiles), alcohol intake in grams per day (quartiles), processed red meat consumption in servings per day (quartiles), and coffee consumption in cups per day (quartiles). d, day.