Table 3 Age-adjusted prevalence (%)* of cardiovascular risk factors and its 95% confidence intervals by income and age groups among 575 377 South Korean male public servants
High incomeLow income
Cigarette smoking, current smoker
    Men aged 30–4456.3 (55.9 to 56.7)64.5 (64.2 to 64.9)
    Men aged 45–5448.4 (48.0 to 48.9)59.7 (59.2 to 60.2)
    Men aged 55–6441.9 (41.2 to 42.5)53.5 (52.7 to 54.4)
Blood pressure, systolic ⩾140 mm Hg or diastolic ⩾90 mm Hg
    Men aged 30–4423.6 (23.4 to 23.8)26.9 (26.7 to 27.2)
    Men aged 45–5438.0 (37.6 to 38.5)41.8 (41.3 to 42.2)
    Men aged 55–6450.6 (49.9 to 51.4)51.7 (50.9 to 52.5)
Cholesterol, ⩾6.2 mmol/l
    Men aged 30–446.9 (6.8 to 7.1)7.1 (6.9 to 7.2)
    Men aged 45–5411.2 (11.0 to 11.4)10.6 (10.4 to 10.8)
    Men aged 55–6412.1 (11.8 to 12.5)11.4 (11.0 to 11.8)
Glucose, ⩾7.0 mmol/l
    Men aged 30–441.5 (1.4 to 1.6)2.2 (2.1 to 2.2)
    Men aged 45–544.1 (4.0 to 4.3)5.4 (5.2 to 5.5)
    Men aged 55–646.7 (6.4 to 6.94)7.2 (6.92 to 7.5)
All four risk factors
    Men aged 30–4470.3 (69.9 to 70.7)77.1 (76.7 to 77.5)
    Men aged 45–5473.9 (73.3 to 74.5)81.1 (80.5 to 81.7)
    Men aged 55–6478.0 (77.1 to 78.9)82.7 (81.7 to 83.7)
  • *Age-adjusted prevalence was calculated with age adjustment to 1-year age groups according to the direct method with the distribution of total sample as the standard.