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Table 5 The proportion of respondents using self-treatment in different self-perceived illness status categories, by year (%)

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

Variables 1993 1998 2003 2008 χ 2
Illness symptoms:      
 Pain NA 28.2 35.1 29.1 34.0**
 Fever NA 21.4 25.8 20.8 831.9**
 Palpitation NA 28.0 38.4 26.2 45.3**
 Other NA 33.2 37.5 27.1 298.6**
χ 2   328.3** 141.0** 83.6**  
Illness severity:      
 Not serious NA 34.9 42.5 32.8 148.3**
 General NA 29.3 38.0 27.5 114.3**
 Serious NA 19.5 24.8 20.1 10.7**
χ 2   459.2** 497.8** 285.5**  
Duration of illness (within 2 weeks):      
 1-2 days 24.9 34.6 37.9 31.4 48.9**
 3-4 days 19.0 28.2 35.3 27.1 28.1**
 ≥5 days 18.1 25.7 34.7 24.9 12.7**
χ 2 148.9** 190.7**(0.000) 21.2** 108.6**  
Course of illness:      
 Acute illness occurred within 2 weeks NA 27.4 33.3 26.6 773.6**
 Acute illness occurred 2 weeks prior NA 19.6 23.5 17.3 5.2
 chronic illness NA 31.5 39.6 28.4 804.8**
χ 2   162.9** 257.3** 133.7**  
  1. Source: Author’s calculations from the four CNHS.
  2. NA: no data available.
  3. *Significant at 5%. **Significant at 1%.