Table 3.

Combined measure of occupational physical activity from 1976 to 1978 and from 1981 to 1983 as predictor for fatal and non-fatal myocardial infarction and all-cause mortality among men and women between 20 and 67 years of age without a history of cardiovascular disorders in the Copenhagen City Heart Study (n=7819)

	Person-years	No. of cases (%)	HR (95% CI)†	HR (95% CI)‡
Men
Myocardial infarction
Occupational physical activity
Low (n=1114)	19 941	133 (12)	1 (reference)	1 (reference)
Moderate (n=1152)	19 828	183 (16)	1.34 (1.07 to 1.68)**	1.30 (1.03 to 1.64)*
High (n=1015)	18 424	145 (14)	1.18 (0.93 to 1.50)	1.20 (0.93 to 1.55)
All-cause mortality
Occupational physical activity
Low (n=1114)	21 108	395 (35)	1 (reference)	1 (reference)
Moderate (n=1152)	21 136	478 (41)	1.17 (1.02 to 1.33)*	1.15 (1.01 to 1.33)*
High (n=1015)	19 596	435 (43)	1.21 (1.05 to 1.38)**	1.22 (1.05 to 1.41)**
Women
Myocardial infarction
Occupational physical activity
Low (n=1506)	27 403	87 (6)	1 (reference)	1 (reference)
Moderate (n=2303)	41 944	113 (5)	0.82 (0.62 to 1.09)	0.76 (0.56 to 1.02)
High (n=729)	15 257	45 (6)	1.10 (0.76 to 1.57)	0.98 (0.67 to 1.44)
All-cause mortality
Occupational physical activity
Low (n=1506)	28 326	439 (29)	1 (reference)	1 (reference)
Moderate (n=2303)	43 330	619 (27)	0.89 (0.79 to 1.01)	0.88 (0.78 to 1.00)
High (n=729)	15 901	194 (27)	0.96 (0.81 to 1.14)	0.95 (0.79 to 1.13)

*p≤0.05, **p≤0.01.

^†Control made for age.

^‡Control made for age, smoking, alcohol, body mass index, leisure time physical activity, systolic blood pressure, diabetes, cholesterol, blood pressure medication and household income.