Table 4

Hazard ratios for death between ages 15 and 45* (95% confidence intervals) from cardiovascular diseases, accidents/suicide, and other causes, in relation to father’s social class, adjusted for birth weight and childhood IQ, for 7308 male singletons born in 1953

Cardiovascular diseases (n=70)Injuries and suicides (n=162)Death from other causes (n=215)
*Participants were followed up for specific causes until 1998.
Father’s social class at birth
    High/middle class1.00 (ref)1.00 (ref)1.00 (ref)
    Working class1.54 (0.91 to 2.64)1.09 (0.78 to 1.53)1.34 (0.93 to 1.83)
    Unknown3.64 (1.75 to 7.53)1.94 (1.14 to 3.28)1.82 (0.90 to 2.92)
Birth weight
    −2499 g1.75 (0.68 to 4.52)1.87 (0.95 to 3.66)2.06 (1.19 to 3.58)
    2500–3499 g0.96 (0.60 to 1.56)1.33 (0.95 to 1.83)1.24 (0.94 to 3.65)
    3500 g+1.00 (ref)1.00 (ref)1.00 (ref)
Härnquist IQ test score at age 12
    per quartile decrease1.10 (0.88 to 1.35)1.16 (1.01 to 1.35)1.17 (1.04 to 1.33)