Table 2.

Association between the incidence of diabetes during 10‐year follow up and passive smoking from a spouse among non‐smoking women

Type of exposure	Age adjusted OR †	95% CI	Multivariable OR † , ‡	95% CI
Spouse’s smoking status
Never smoker	1		1
Former smoker	0.90	(0.73–1.11)	0.93	(0.75–1.14)
Current smoker	1.03	(0.85–1.23)	1.03	(0.86–1.25)
Spouse's smoking status with number of cigarettes per day §
Never smoker	1		1
Former smoker	0.90	(0.73–1.01)	0.92	(0.75–1.13)
Current smokers, <20/day	0.76	(0.58–0.99)	0.75	(0.57–0.98)
Current smoker, 20 to <30/day	1.12	(0.90–1.38)	1.11	(0.89‐1.38)
Current smoker, 30 to <40/day	1.11	(0.81–1.54)	1.10	(0.79–1.53)
Current smoker, ≥40/day	1.40	(1.01–1.95)	1.34	(0.96–1.87)
P for trend ¶		0.01		0.02

CI, confidence interval; OR odds ratio.

^†Total n = 25,391. Pooled logistic regression model. The number of observations changed at the second follow‐up period.

^‡Adjusted for nine regions, age, the term of survey (baseline to 5‐year survey or 5‐year survey to 10‐year survey), body mass index (quartile groups, missing), hypertension, parental history of diabetes, leisure‐time physical activity (none, once a week to daily, missing), intakes of coffee (none, 1–2 cups/week, 3–4 cups/week, ≥5 cups/week, and missing) and alcohol (none, occasional, regular, missing), and workplace (or public facilities) passive smoke exposure (no exposure, less than every day, every day).

^§Excluding individuals whose smoking husbands did not provide the number of cigarettes per day.

^¶Never and former smokers assigned 0, and current smokers were assigned a median value for each category.