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Table 2 Subject characteristics

From: Effects of cow’s milk beta-casein variants on symptoms of milk intolerance in Chinese adults: a multicentre, randomised controlled study

Site Beijing Guangzhou Shanghai
Sequence A1➔A2 (n=100) A2➔A1 (n=100) A1➔A2 (n=100) A2➔A1 (n=100) A1➔A2 (n=100) A2➔A1 (n=100)
  n/mean %/SD n/mean %/SD n/mean %/SD n/mean %/SD n/mean %/SD n/mean %/SD
Males 56 56% 48 48% 39 39% 41 41% 52 52% 43 43%
Age (years) 37.2 8.3 35.5 8.5 36 7.6 36.3 7.6 35 8.9 35 9.3
 20–35 years 50 50% 50 50% 50 50% 50 50% 50 50% 50 50%
  30 4.6 28.3 4.2 39.8 4.4 30.1 4.3 27.3 5 26.9 4.1
 36–50 years 50 50% 50 50% 50 50% 50 50% 50 50% 50 50%
  44.3 3.7 42.7 4.8 42.2 4.2 42.5 4.4 42.6 3.8 43.2 4.6
Weight (kg) 69.7 11.5 68.7 11.3 60.1 10.4 60.4 11.2 62.7 12.1 63.5 11.3
Height (cm) 171.1 10 168.7 9.6 164.5 7.0 163.6 7.4 166.9 7.9 164.2 12
Site All sites         
Sequence A1➔A2 (n=300) A2➔A1 (n=300)         
  n/mean %/SD n/mean %/SD         
Males 147 49% 132 44%         
Age (years) 36 8.3 35.6 8.5         
 20–35 years 150 50% 150 50%         
  29 4.8 28.4 4.4         
 36–50 years 150 50% 150 50%         
  43 4 42.8 4.6         
Weight (kg) 64.2 12 64.2 11.7         
Height (cm) 167.5 8.8 165.5 10.1         
  1. A1 conventional milk containing A1 and A2 β-casein, A2 milk containing A2 β-casein