Distribution of risk factors in IQ categories among men in the study sample
IQ | |||||
---|---|---|---|---|---|
N exposed | Low (1–3) N=555 | Medium (4–6) N=1080 | High (7–9) N=521 | p Value | |
Early life factors | |||||
Parent's CVD death, age <65 | 394 | 18.9 | 18.2 | 17.5 | 0.83 |
Low socioeconomic position in childhood | 1321 | 73.2 | 61.9 | 47.2 | <0.001 |
Factors in adolescence | |||||
BMI | – | 21.8 | 21.7 | 21.3 | 0.01 |
Smoking 1–10 cigarette/day | 718 | 35.3 | 33.7 | 27.5 | 0.01 |
Smoking >10 cigarette/day | 863 | 43.2 | 40.6 | 33.4 | 0.003 |
Risk use of alcohol | 380 | 25.2 | 16.0 | 11.5 | <0.001 |
Systolic blood pressure | – | 129.0 | 127.8 | 126.1 | <0.001 |
Factors in adulthood* | |||||
Occupation | |||||
Non-manual | 784 | 14.05 | 36.5 | 58.9 | <0.001 |
Manual | 905 | 62.9 | 40.5 | 20.9 | <0.001 |
Self-employed/farmer | 170 | 5.59 | 9.17 | 6.72 | 0.02 |
Unclassified | 327 | 17.5 | 13.9 | 13.4 | 0.10 |
Income† | – | 158.1 | 177.9 | 209.3 | <0.001 |
Single household | 50.5 | 39.5 | 37.0 | <0.001 | |
Other diagnoses | |||||
Comorbidity‡ | 75 | 3.78 | 3.24 | 3.65 | 0.83 |
Complications§ | 119 | 5.59 | 5.19 | 6.14 | 0.73 |
*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.