Table 3.

Mortality from myocardial infarction and stroke of male construction workers with normal blood pressure in different cold conditions

Models	Exposure		Myocardial infarction			Stroke
	Region	N	Cases	RR	95% CI	Cases	RR	95% CI
Crude	Reference	93,812	2856	1.0		767	1.0
	Colder	74,931	2405	0.96	0.68–1.35	654	0.97	0.64–1.46
	Coldest	25,756	846	0.93	0.65–1.32	229	0.86	0.55–1.36
Adjusteda	Reference	93,812	2856	1.0		767	1.0
	Colder	74,931	2405	0.99	0.93–1.06	654	0.99	0.90–1.10
	Coldest	25,756	846	1.10	1.01–1.20	229	1.09	0.94–1.25

^aAdjusted for age, BMI, smoking habits, and occupational noise