Table 1

Distribution of sociodemographic characteristics and age-adjusted mean and prevalence of major CVD risk factors at baseline, in the entire sample and by aggregated Erikson-Goldthorpe-Portocarero occupational classes

Occupational class
Entire sampleManagers and proprietorsNon-manual and manual workersp Value
Subjects CHD-free at baseline, n41038193284
Age, years40.9 (9.3)44.0 (10.3)40.1 (8.8)<0.0001*
High school diploma or higher (%)39.445.837.8<0.0001†
High Job Strain (%)26.012.929.2<0.0001†
Active (%)14.823.612.6
Passive (%)35.624.238.5
Low job strain (%)23.739.319.8
Systolic blood pressure, mm Hg127.2 (16.2)126.7127.50.22‡
Total cholesterol, mg/dL211.4 (41.3)215.5210.70.002‡
HDL cholesterol, mg/dL49.5 (12.9)49.449.60.79‡
Current cigarette smokers (%)39.235.840.00.03‡
Diabetes mellitus (%)‡
Median follow-up, years14.617.214.0
CHD first fatal or non-fatal events, n17264108
  • Men were 25–64 years old and employed at time of recruitment.

  • Unless, otherwise indicated, the numbers reported in the table are means and SDs.

  • *ANOVA F-test.

  • †χ2 Test.

  • ‡Wald χ2 test (2df) from generalised linear model adjusted for age. Mean and prevalence of risk factors estimated at the sample age mean of 41 years.

  • ANOVA, analysis of variance; CHD, coronary heart disease; HDL, high-density lipoprotein.