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Table 2 Relationship between social position and baseline characteristics before/after weighting the inverse probability of treatment

From: Social participation and mortality: does social position in civic groups matter?

  Before weighting the inverse probability of treatment After weighting the inverse probability of treatment
  Regular position (%) Leadership position (%) P value Regular position (%) Leadership position (%) P value
Age    <.0001    0.96
 65–69 31.8 42.5   35.7 35.4  
 70–74 28.3 31.9   29.6 29.4  
 75–79 23.6 18.0   21.6 21.9  
 80–84 11.3 5.8   9.3 9.4  
 85 or older 5.0 1.8   3.8 3.9  
Sex    <.0001    0.73
 Female 57.3 41.2   51.4 51.6  
 Male 42.7 58.8   48.7 48.4  
Annual equivalized household income (JPY)    <.0001    0.42
 <19,999 43.7 38.3   42.0 42.9  
 20,000–39,999 44.6 49.3   46.1 45.3  
40,000 11.7 12.4   11.9 11.8  
Educational attainment    <.0001    0.86
 Less than 6 years 4.8 2.1   3.8 4.0  
 6–9 years 57.7 50.4   55.2 55.7  
 10–12 years 28.8 33.7   30.5 30.0  
 13 years and more 8.4 13.4   10.2 10.0  
 Other 0.3 0.4   0.3 0.3  
Marital status    <.0001    0.35
 Married and spouse is alive 67.9 78.9   71.9 71.3  
 Other 32.1 21.1   28.1 28.7  
Self-reported health    <.0001    0.55
 Very good 7.0 11.3   8.7 8.5  
 Good 63.9 67.8   65.3 64.8  
 Poor 23.8 17.8   21.6 21.9  
 Very poor 5.2 3.1   4.4 4.8  
Self-reported physical function    <.0001    0.31
 Very good 11.3 17.5   13.6 13.3  
 Good 67.3 68.8   67.8 67.6  
 Poor 17.4 11.7   15.3 15.4  
 Very poor 3.9 2.1   3.3 3.7  
Self-reported medical conditions    <.0001    0.93
 No illness 16.1 21.1   18.0 17.8  
 Having illness but need no treatment 9.2 12.2   10.2 10.1  
 Having illness but discontinued treatment 6.5 6.1   6.4 6.4  
 Receiving some treatment 68.3 60.6   65.4 65.8  
Geriatric Depression Scale    <.0001    0.58
 Normal 63.3 76.6   68.1 67.7  
 Mildly depressed 33.6 21.9   29.3 29.9  
 Severely depressed 3.1 1.5   2.6 2.5  
Residence year    <.0001    0.67
Less than 10 years 3.9 2.2   3.3 3.7  
 10–19 years 5.1 3.7   4.6 4.9  
 20–29 years 8.1 7.4   7.9 7.9  
 30–39 years 12.9 12.8   12.9 12.9  
 40–49 years 16.3 16.8   16.5 16.4  
 50 years and more 53.8 57.0   54.8 54.3  
  1. As multiple imputation was applied to the dataset, the result is based on the first of ten dataset but almost same results were acquired from the other datasets