Table 4.
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 stratified on leisure time physical activity in 1981–1983 in the Copenhagen City Heart Study (n=7816)
| Occupational physical activity | Person-years | No. of cases (%) | HR (95% CI)† | HR (95% CI)‡ | |
| Men | |||||
| Myocardial infarction | |||||
| Low leisure time physical activity (n=447) | Low (n=166) | 2825 | 25 (15) | 1 (reference) | 1 (reference) |
| Moderate (n=136) | 2248 | 25 (18) | 1.28 (0.74 to 2.23) | 1.39 (0.76 to 2.53) | |
| High (n=145) | 2382 | 23 (16) | 1.15 (0.65 to 2.03) | 1.15 (0.62 to 2.13) | |
| Moderate leisure time physical activity (n=1468) | Low (n=531) | 9544 | 59 (11) | 1 (reference) | 1 (reference) |
| Moderate (n=532) | 9131 | 82 (15) | 1.39 (1.00 to 1.95) | 1.27 (0.89 to 1.80) | |
| High (n=405) | 7254 | 63 (16) | 1.43 (1.00 to 2.04)* | 1.41 (0.96 to 2.06) | |
| High leisure time physical activity (n=1364) | Low (n=417) | 7572 | 49 (12) | 1 (reference) | 1 (reference) |
| Moderate (n=483) | 8442 | 75 (16) | 1.31 (0.92 to 1.88) | 1.27 (0.87 to 1.86) | |
| High (n=464) | 8761 | 59 (13) | 1.00 (0.69 to 1.47) | 1.04 (0.69 to 1.55) | |
| All-cause mortality | |||||
| Low leisure time physical activity (n=447) | Low (n=166) | 3012 | 74 (45) | 1 (reference) | 1 (reference) |
| Moderate (n=136) | 2422 | 73 (54) | 1.27 (0.92 to 1.75) | 1.15 (0.81 to 1.62) | |
| High (n=145) | 2549 | 85 (59) | 1.48 (1.08 to 2.02)* | 1.56 (1.11 to 2.18)* | |
| Moderate leisure time physical activity (n=1468) | Low (n=531) | 10 049 | 185 (35) | 1 (reference) | 1 (reference) |
| Moderate (n=532) | 9702 | 230 (43) | 1.24 (1.02 to 1.50)* | 1.28 (1.05 to 1.57)* | |
| High (n=405) | 7794 | 179 (44) | 1.29 (1.05 to 1.59)* | 1.31 (1.05 to 1.63)* | |
| High leisure time physical activity (n=1364) | Low (n=417) | 8048 | 136 (33) | 1 (reference) | 1 (reference) |
| Moderate (n=483) | 8997 | 174 (36) | 1.08 (0.86 to 1.35) | 0.96 (0.76 to 1.22) | |
| High (n=464) | 9226 | 171 (37) | 1.06 (0.85 to 1.33) | 1.00 (0.78 to 1.26) | |
| Women | |||||
| Myocardial infarction | |||||
| Low leisure time physical activity (n=637) | Low (n=248) | 4085 | 17 (7) | 1 (reference) | 1 (reference) |
| Moderate (n=309) | 5335 | 18 (6) | 0.82 (0.42 to 1.59) | 1.03 (0.49 to 2.15) | |
| High (n=80) | 1564 | 7 (9) | 1.13 (0.47 to 2.73) | 1.55 (0.55 to 4.35) | |
| Moderate leisure time physical activity (n=2568) | Low (n=899) | 16 632 | 58 (6) | 1 (reference) | 1 (reference) |
| Moderate (n=1317) | 24 387 | 63 (5) | 0.72 (0.50 to 1.03) | 0.65 (0.45 to 0.95)* | |
| High (n=352) | 7427 | 22 (6) | 1.01 (0.62 to 1.65) | 0.78 (0.46 to 1.33) | |
| High leisure time physical activity (n=1332) | Low (n=358) | 6671 | 12 (3) | 1 (reference) | 1 (reference) |
| Moderate (n=677) | 12 222 | 32 (5) | 1.38 (0.71 to 2.68) | 1.00 (0.49 to 2.01) | |
| High (n=297) | 6266 | 16 (5) | 1.75 (0.82 to 3.70) | 1.18 (0.54 to 2.60) | |
| All-cause mortality | |||||
| Low leisure time physical activity (n=637) | Low (n=248) | 4247 | 94 (38) | 1 (reference) | 1 (reference) |
| Moderate (n=309) | 5503 | 106 (34) | 0.87 (0.66 to 1.14) | 0.89 (0.66 to 1.20) | |
| High (n=80) | 1612 | 30 (38) | 0.91 (0.60 to 1.37) | 0.99 (0.63 to 1.54) | |
| Moderate leisure time physical activity (n=2568) | Low (n=899) | 17 210 | 259 (29) | 1 (reference) | 1 (reference) |
| Moderate (n=1317) | 25 221 | 325 (25) | 0.83 (0.70 to 0.98)* | 0.80 (0.68 to 0.95)* | |
| High (n=352) | 7726 | 90 (26) | 0.93 (0.73 to 1.18) | 0.92 (0.71 to 1.18) | |
| High leisure time physical activity (n=1332) | Low (n=358) | 6853 | 86 (24) | 1 (reference) | 1 (reference) |
| Moderate (n=677) | 12 607 | 188 (28) | 1.12 (0.87 to 1.45) | 1.06 (0.81 to 1.39) | |
| High (n=297) | 6563 | 74 (25) | 1.18 (0.86 to 1.61) | 1.05 (0.76 to 1.45) | |
*p≤0.05.
†
Control made for age.
‡
Control made for age, smoking, alcohol, body mass index, systolic blood pressure, diabetes, cholesterol, blood pressure medication, and household income.