Table 2.

Relation between parental history of CHD and fatal CHD in the male offspring

Parental history of CHD	Number (%) deaths	Hazard ratio (95% CI) (unadjusted)	Hazard ratio (95% CI) (adjusted for year of birth)	Hazard ratio (95% CI) (fully adjusted)*
Neither parent†	326 (87.4)	1	1	1
Either parent	47 (12.6)	1.60 (1.18 to 2.18)	1.53 (1.13 to 2.09)	1.53 (1.13 to 2.08)
Father only	35 (9.7)	1.59 (1.12 to 2.26)	1.53 (1.08 to 2.17)	1.53 (1.08 to 2.18)
Mother only	9 (2.7)	1.26 (0.65 to 2.45)	1.20 (0.62 to 2.33)	1.19 (0.61 to 2.32)
Both parents	3 (0.9)	10.08 (3.23 to 31.46)	9.88 (3.16 to 30.89)	8.65 (2.65 to 28.31)

*Adjusted for year of birth quintile, cigarette smoking, father’s social class, height, body mass index, and systolic BP.

†Reference category.

CI, confidence interval.