Table 2

Distribution of risk factors in IQ categories among men in the study sample

IQ
N exposedLow (1–3)
N=555
Medium (4–6)
N=1080
High (7–9)
N=521
p Value
Early life factors
 Parent's CVD death, age <6539418.918.217.50.83
 Low socioeconomic position in childhood132173.261.947.2<0.001
Factors in adolescence
 BMI21.821.721.30.01
 Smoking 1–10 cigarette/day71835.333.727.50.01
 Smoking >10 cigarette/day86343.240.633.40.003
 Risk use of alcohol38025.216.011.5<0.001
 Systolic blood pressure129.0127.8126.1<0.001
Factors in adulthood*
 Occupation
  Non-manual78414.0536.558.9<0.001
  Manual90562.940.520.9<0.001
  Self-employed/farmer1705.599.176.720.02
  Unclassified32717.513.913.40.10
  Income†158.1177.9209.3<0.001
  Single household50.539.537.0<0.001
Other diagnoses
 Comorbidity‡753.783.243.650.83
 Complications§1195.595.196.140.73
  • *Occupation and income in 1990, at age about 40. Single household at the year or preceding year of first CHD event.

  • †In 1000 Swedish kronor/year.

  • ‡Diabetes with complications, pulmonary oedema, acute or chronic renal failure, cerebrovascular disease, malignancy and depression.

  • §Cardiogenic shock, cardiac dysrhythmias and congestive heart failure.

  • BMI, body mass index; CHD, coronary heart disease; CVD, cardiovascular diseases.