Table 2.

Socioeconomic characteristics of the parents of the studied men born in 1973-83^a

	CHD
	Yes		No
	Count	%	Count	%	P-value b
Mothers’ educational level					0.716
9-10 years	772	28.7	148226	28.5
11-13 years	1108	41.2	218839	42.1
> = 14 years	621	23.1	118229	22.8
Missing	188	7.0	34233	6.6
Fathers’ educational level					0.911
9-10 years	852	31.7	163384	31.4
11-13 years	1081	40.2	207035	39.9
> = 14 years	563	20.9	110334	21.2
Missing	193	7.2	38774	7.5
Mothers’ marital status					0.047
Married	1837	68.3	360903	69.5
Divorced/widow	736	27.4	140602	27.1
Unmarried	116	4.3	18022	3.5
Mothers’ age					<0.001
13-19 years	97	3.6	20875	4.1
20-26 years	1056	39.3	216352	41.6
27-33 years	1129	42.0	221288	42.6
> = 34 years	407	15.1	61010	11.7
Mothers’ parity					0.142
No previous children	1101	40.9	220038	42.4
Previous children	1588	59.1	299489	57.6
Parents’ country of origin					0.788
One or both non-Nordic	202	7.5	39744	7.7
Both Nordic	2487	92.5	479783	92.3

^aAnalysis performed on all 522 216 men in the study cohort whose parents could be identified through the registries. All variables were measured at the time of the men’s birth (i.e. in 1973-83).

^bChi-squared test.