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Table 2 Socioeconomic characteristics of the parents of the studied men born in 1973-83 a

From: Congenital heart disease in men – birth characteristics and reproduction: a national cohort study

  CHD  
  Yes No  
  Count % Count % P-valueb
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  
  1. 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).
  2. bChi-squared test.