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Table 1 Demographic characteristics of parents and their child

From: Parents’ attitudes towards and perceptions of involving minors in medical research from the Japanese perspective

  Number (%)
Parent’s relationship with child
 Father 672 58.4%
 Mother 478 41.6%
Parent’s age (mean, S.D) 42.6 (7.1)  
 Father 43.9 (7.1)  
 Mother 40.8 (6.7)  
Age of first child (mean, S.D) 12.2 (3.9)  
Age of second child (mean, S.D) 8.1 (4.3)  
Number of children
 1 448 39.0%
 2 524 45.6%
  ≥ 3 178 15.5%
History of being admitted to hospital Exists (Yes) 227 19.7%
Non-existent 923 80.3%
Children’s experience being admitted to hospital Exists (Yes) 206 17.9%
Non-existent (No) 944 82.1%
Academic history (education level)
 Middle school 21 1.8%
 High school 298 25.9%
 Professional school 170 14.8%
 University 531 46.2%
 Graduate school 60 5.2%
 Others 70 6.0%