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Table 1 Characteristics of family members, specified by generation and gender

From: Familial correlation and aggregation of body mass index and blood pressure in Chinese Han population

  Fathers Mothers pvalue* Sons Daughters pvalue#
Number of individuals       
  Total 6369 6369   4132 2237  
  18 ~ 25 years 0 0   2533 1717  
  26 ~ 35 years 3 8   1474 469  
  36 ~ 45 years 953 1498   119 48  
  46 ~ 55 years 3578 3757   6 3  
  56 ~ 65 years 1835 1106   0 0  
Age (mean ± SD) 52.0 ± 6.2 49.8 ± 5.8 0.001 24.8 ± 5.0 23.0 ± 4.7 0.001
Body mass index (mean ± SD) 23.4 ± 3.3 24.2 ± 3.6 0.001 22.4 ± 3.5 21.6 ± 3.2 0.001
Systolic blood pressure (mean ± SD) 126.8 ± 19.4 126.2 ± 21.4 0.141 115.7 ± 12.1 108.1 ± 11.6 0.001
Diastolic blood pressure (mean ± SD) 81.6 ± 11.7 79.8 ± 11.8 0.001 75.1 ± 9.4 70.5 ± 8.7 0.001
Highly educated (High school and above) (%) 22.2 13.6 0.001 38.0 50.4 0.001
Employed (%) 78.9 53.0 0.001 89.8 80.3 0.001
Body weight classification (%)    0.001    0.001
  Normal weight 69.8 62.6   79.4 87.8  
  Overweight 27.0 30.8   17.5 10.1  
  Obesity 3.2 6.6   3.1 2.1  
Blood pressure classification (%)    0.001    0.001
Normotension 28.7 35.0   51.2 75.7  
  Prehypertension 41.4 36.8   41.1 21.3  
  Stage 1 hypertension 19.1 17.5   6.5 2.6  
  Stage 2 hypertension 10.8 10.7   1.2 0.3  
  1. *Compared between paired fathers and mothers; # compared between grouped sons and daughters.