TABLE 2.
Cox Proportional Hazard Ratios (HRs) and 95% Confidence Intervals (CIs) for Acute Myocardial Infarction (MI), by Conventional Risk Factors: Still Working Study, Finland, January 1, 1987, to December 31, 2004
| No. (No. of Acute MIs) | HR (95% CI) | P | |
| Age at baseline, y | <.001 | ||
| 18–44 | 5055 (133) | 1.00 | |
| 45–54 | 2189 (196) | 3.99 (3.12, 4.84) | |
| 55–64 | 419 (43) | 4.77 (3.38, 6.74) | |
| Gender | <.001 | ||
| Women | 1716 (24) | 1.00 | |
| Men | 5947 (348) | 4.88 (3.23, 7.39) | |
| Occupational status | .88 | ||
| White collar | 2490 (123) | 1.00 | |
| Blue collar | 5173 (249) | 1.02 (0.82, 1.26) | |
| Educational attainment | .13 | ||
| Vocational school/college | 3270 (167) | 1.00 | |
| Vocational school | 3295 (161) | 1.36 (0.98, 1.91) | |
| No vocational education | 1098 (44) | 1.25 (0.89, 1.74) | |
| Marital status | .51 | ||
| Married | 5436 (292) | 1.00 | |
| Unmarried | 2227 (80) | 0.92 (0.71, 1.18) | |
| Smoking status | <.001 | ||
| No | 5127 (199) | 1.00 | |
| Yes | 2536 (173) | 2.14 (1.74, 2.63) | |
| Alcohol use | .67 | ||
| No | 6662 (328) | 1.00 | |
| Yes | 1001 (44) | 0.93 (0.68, 1.28) | |
| Physical activity | .15 | ||
| More than once per week | 2745 (151) | 1.00 | |
| Once per week | 2527 (124) | 1.13 (0.86, 1.47) | |
| Less than once per week | 2391 (97) | 1.28 (1.00, 1.65) | |
| Prevalent hypertension | <.001 | ||
| No | 7343 (333) | 1.00 | |
| Yes | 320 (39) | 1.89 (1.35, 2.66) | |
| Prevalent diabetes | <.001 | ||
| No | 7607 (359) | 1.00 | |
| Yes | 56 (13) | 5.03 (2.88, 8.78) | |
| Psychological distress | .17 | ||
| No | 5676 (265) | 1.00 | |
| Yes | 1987 (107) | 0.86 (0.68, 1.07) | |
| Physical work environment | .83 | ||
| No hazards | 4020 (200) | 1.00 | |
| Hazardous | 3643 (172) | 1.02 (0.83, 1.26) |
Note. Models were adjusted for age and gender.