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Table 4 The proportion of respondents using self-treatment in different health-behavior and daily health status categories, by year (%)

From: Use of and factors associated with self-treatment in China

Variables 1993 1998 2003 2008 χ 2
Smoking:      
 No 19.1 30.1 36.7 28.1 2000.0**
 Yes 23.2 31.3 38.2 26.1
χ 2 54.7** 3.5 4.5* 2.3  
Drinking:      
 No 19.6 30.3 36.9 27.7 192.0**
 Yes 23.5 31.2 38.7 31.5
χ 2 31.8** 1.1 2.6 21.8**  
Exercising:      
 No 18.8 28.1 34.8 27.7 215.6**
 Yes 29.5 40.8 47.0 29.3
χ 2 223.9** 300.7** 224.1** 7.5**  
Chronic illness:      
 No 17.2 25.6 31.5 25.4 466.8**
 Yes 24.2 31.6 39.7 28.1
χ 2 224.5** 143.4** 201.7** 27.3**  
Limited activity limiter:      
 No 20.0 28.5 37.9 28.7 1400.0**
 Yes 20.4 27.1 30.2 25.3
χ 2 0.3 1.5 147.7** 24.3**  
  1. *Significant at 5%. **Significant at 1%.