Table 2

Hazard ratios for all cause mortality between ages 15 and 49 (95% confidence intervals) in relation to paternal social position, adjusted for birth weight and cognitive function for 7308 male singletons born in 1953

Mortality risk ages 15 to 49
Model 1Model 2Model 3Model 4Model 5
Besides paternal social class, model 1 includes birth weight; model 2 includes Härnquist IQ test; model 3 includes the Mednick Creativity test; model 4 includes both cognitive tests; and the final model 5 includes paternal social class, birth weight, and Härnquist IQ test.
Father’s social class
    High/middle class1.00 (ref)1 (ref)1.00 (ref)1.001.00 (ref)
    Working class1.40 1.17 to 1.63)1.31 (1.07 to 1.57)1.32 (1.12 to 1.62)1.30 (1.08 to 1.57)1.30 (1.08 to 1.57)
    Unknown1.94 (1.42 to 2.66)1.85 (1.32 to 2.50)1.98 (1.42 to 2.74)1.83 (1.32 to 2.51)1.81 (1.32 to 2.49)
Birth weight
    −2400 g1.60 (1.08 to 2.38)1.54 (1.04 to 2.29)
    2500–3400 g1.22 (1.02 to 1.45)1.21 (1.01 to 1.44)
    3500 g+1.00 (ref)1.00 (ref)
Härnquist IQ test
    Lowest quartile1.55 (1.21 to 2.00)1.45 (1.10 to 1.93)1.53 (1.19 to 1.97)
    Second quartile1.22 (0.94 to 1.59)1.16 (0.88 to 1.54)1.20 (0.92 to 1.51)
    Third quartile1.08 (0.82 to 1.43)1.06 (0.80 to 1.39)1.07 (0.81 to 1.41)
    Higest quartile1.00 (ref)1.00 (ref)1.00 (ref)
Creativity test
    Lowest quartile1.40 (1.09 to 1.78)1.17 (0.89 to 1.54)
    Second quartile1.22 (0.94 to 1.59)1.10 (0.83 to 1.44)
    Third quartile1.21 (0.93 to 1.58)1.14 (0.86 to 1.49)
    Higest quartile1.00 (ref)1.00 (ref)