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Table 1 Sociodemographic profile of the sample population

From: Adaptive behavior in Chinese children with Williams syndrome

Characteristics WS group (n = 26) CA group (n = 40) MA group (n = 30)
   Mean + SD/n t/x2 df p value Mean ± SD/n t/x2 df p value
Age 89.66 ± 36.66 92.13 ± 30.83 t = −0.294 64 0.770 36.17 ± 10.65 t = 7.638 54 0.000
Sex    x2 = 0.000 1 1.000   x2 = 0.249 1 0.618
  Male 13 20     17    
  Female 13 20     13    
PPVT raw score 31.96 ± 24.71 101.42 + 24.55 t = −11.205 64 0.000 28.3 + 13.81 t = 0.696 54 0.489
Family characteristics    x2 = 4.047 1 0.044   x2 = 1.649 1 0.199
  Nuclear family, only child 14 32     13    
  Nuclear family, Multiple children 4 2 1
  Extended family 8 6 16
Family income (yuan/month)    x2 = 0.003 1 0.954   x2 = 0.267 1 0.649
  >7500 13 20     16    
  3000-7500 11 14 11
  <3000 2 6 3
Caregiver Education (yrs)    x2 = 4.097 1 0.043   x2 = 7.045 1 0.008
>12 9 23     18   
9–12 9 7 8
<9 8 10     4