Table 3

HRs of first CHD event, by occupational class

EGP classNo of eventsAge-adjusted HR (95% CI)MRF adjusted*MRF and JS adjusted
HR (95% CI)Decrease in HR§ (%)HR (95% CI)Decrease in HR§ (%)
Administrators and professionals131.56 (0.6 to 4.0)1.55 (0.6 to 4.0)1.51.58 (0.6 to 4.1)−2.7
Non-manual workers7RefRefRef
Manual workers131.49 (0.6 to 3.8)1.18 (0.5 to 3.0)57.81.12 (0.4 to 2.9)71.4
Self-employed152.28 (0.9 to 5.7)2.38 (1.0 to 6.0)−5.32.45 (1.0 to 6.2)−8.9
p Value0.350.200.15
  • Results are based on CHD-free subjects, currently employed and with valid data on physical activity and job stress (N=1441). Age-adjusted HRs are the reference levels used to estimate decreases in MRF-adjusted and MRF plus job strain-adjusted HRs.

  • * MRF, multiple risk factors (age, systolic blood pressure, total cholesterol, HDL-cholesterol, current cigarette smokers, diabetes mellitus, alcohol intake, sport physical activity index).

  • Multivariate model including MRF and job strain (PJD/DL ratio, dichotomised at the median).

  • Heterogeneity, χ2 test p value.

  • § On the logarithmic scale, from the age-adjusted model.

  • CHD, coronary heart disease; DL, decision latitude; EGP, Erikson–Goldthorpe–Portocarero class scheme; PJD, psychological job demand.