Risk factors-adjusted HRs (with 95% CIs) for SpPA in different OPA categories, and test for SpPA–OPA interaction on the incidence of CHD and CVD events
| OPA | SpPA | N | CHD events (n=135) | CVD events (n=174) | ||
| Rate | HR (95% CI) | Rate | HR (95% CI) | |||
| Low | Poor | 799 | 4.09 | Ref | 4.79 | Ref |
| Low | Intermediate/recommended | 544 | 1.56 | 0.45 (0.24 to 0.87) | 1.86 | 0.45 (0.25 to 0.82) |
| Intermediate | Poor | 673 | 2.01 | Ref | 2.98 | Ref |
| Intermediate | Intermediate/recommended | 454 | 2.29 | 1.20 (0.54 to 2.67) | 2.41 | 0.93 (0.43 to 1.98) |
| High | Poor | 759 | 2.40 | Ref | 3.57 | Ref |
| High | Intermediate/recommended | 345 | 3.56 | 1.84 (0.88 to 3.87) | 4.98 | 1.66 (0.87 to 3.14) |
| Heterogeneity test p value* | – | – | 0.02 | – | 0.01 | |
| Interaction test p value† | – | 0.02 | – | 0.01 | ||
Men, aged 25–64 years, free of CVD and currently employed at baseline (n=3574). Rates (x1000 person years) are age-adjusted and estimated at the sample mean age.
Adjusted for age, cohort type (population-based vs factory-based), educational level, body mass index, total cholesterol, HDL cholesterol, systolic blood pressure, current smoking, diabetes and alcohol intake.
*Wald χ2 test (5 df).
†Wald χ2 test for interaction (2 df).
CHD, coronary heart disease; CVD, cardiovascular disease; HDL, high-density lipoprotein; OPA, occupational physical activity; Ref, reference; SpPA, sport physical activity.