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Table 1 Descriptive statistics of the twin samples

From: Epigenetic signature of birth weight discordance in adult twins

  All twins Young twins* Old twins*
Age, years    
Min 30 30 57
Max 74 36 74
Median 57 33 63
Sex, pairs    
Male 78 40 38
Female 72 33 39
Birth weight, grams    
Min 1100 1125 1100
Max 4625 4625 4150
Mean 2528 2587 2577
Birth weight discordance, %    
Min 5.26 10.34 5.26
Max 47.06 47.06 45.00
Mean 17.73 19.05 17.51
Gestational age, weeks    
Min   33  
Max   42  
Median   39  
  1. *Young twins were born after 1973 and old twins born before 1973. Gestational age was available after 1973 from The Danish Medical Birth Registry.