Table 3 Hazard ratios for ischaemic heart disease death in men and women with a ponderal index ⩾26 kg/m3 compared with those with a ponderal index <26 kg/m3, stratified by personal or household income, adjusted for age and period of birth
Hazard ratios (95% CI)
MenWomen
Personal earned gross income (1970)
    Zero0.47 (0.27 to 0.83)0.72 (0.47 to 1.09)
    1st Quartile0.85 (0.68 to 1.07)0.88 (0.58 to 1.35)
    2nd Quartile1.15 (0.90 to 1.48)1.18 (0.72 to 1.93)
    3rd Quartile1.01 (0.78 to 1.30)0.93 (0.61 to 1.43)
    4th Quartile1.05 (0.80 to 1.39)1.05 (0.68 to 1.64)
Household total gross income (1970)
    1st Quartile0.89 (0.70 to 1.13)1.12 (0.77 to 1.61)
    2nd Quartile1.16 (0.90 to 1.51)0.81 (0.52 to 1.25)
    3rd Quartile0.85 (0.65 to 1.11)0.99 (0.65 to 1.51)
    4th Quartile1.09 (0.83 to 1.43)0.60 (0.38 to 0.95)