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Table 3 Birth characteristics of the 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-value
Birthweight (g) (mean/SD) b 3328 720 3556 547 <0.001
Gestational length (weeks) (mean/SD) b 38.9 2.8 39.6 1.8 <0.001
Born preterm c      <0.001
Yes 339 12.6 26299 5.1  
No 2350 87.4 493228 94.9  
Born small-for-gestational-age c      <0.001
Yes 325 12.1 26213 5.0  
No 2364 87.9 493314 95.0  
Born large-for-gestational-age c      <0.001
Yes 158 5.9 22767 4.4  
No 2531 94.1 496760 95.6  
Twin birth c      <0.001
Yes 83 3.1 8230 1.6  
No 2606 96.9 511196 98.4  
Instrumental delivery c      0.8
Yes 179 6.7 35167 6.8  
No 2510 93.3 484360 93.2  
Caesarean section c      <0.001
Yes 437 16.3 51008 9.8  
No 2252 83.7 468519 90.2  
  1. aAnalysis performed on all 522 216 men in the study cohort.
  2. bAnalysis of variance corrected by Tukey-Kramer procedure.
  3. cChi-squared test.