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Table 1 Descriptive statistics stratified by year

From: Improving health equity: changes in self-assessed health across income groups in China

Characteristic Year 2010 Year 2014 X2 P*
  N(%)[SE]a (n = 31,743) N(%)[SE]a (n = 32,006)   
Age   307.23 < 0.001
 15–30 6151 (26.82%) [0.35%] 7056 (26.11%) [0.35%]   
 30–40 5529 (19.29%) [0.29%] 4623 (17.11%) [0.30%]   
 40–50 7389 (21.51%) [0.29%] 6699 (21.41%) [0.31%]   
 50–60 6109 (15.50%) [0.24%] 5744 (15.88%) [0.26%]   
  > 60 6565 (16.88%) [0.26%] 7884 (19.49%) [0.28%]   
Gender   23.78 < 0.001
 female 16,320 (49.11%) [0.36%] 15,842 (49.53%) [0.38%]   
 male 15,423 (50.89%) [0.36%] 16,174 (50.47%) [0.38%]   
Region   60.30 < 0.001
 western 8846 (27.35%) [0.34%] 9413 (26.45%) [0.34%]   
 central 7509 (25.51%) [0.31%] 8064 (25.03%) [0.31%]   
 eastern 15,388 (47.13%) [0.36%] 14,539 (48.52%) [0.38%]   
Residence   43.30 < 0.001
 urban 14,727 (50.25%) [0.36%] 13,906 (56.33%) [0.36%]   
 rural 17,016 (49.75%) [0.36%] 17,846 (43.67%) [0.36%]   
Education   18.99 < 0.001
 illiteracy 9162 (24.80%) [0.30%] 8687 (24.12%) [0.31%]   
 up to junior high school 15,937 (51.88%) [0.36%] 15,653 (53.15%) [0.39%]   
 up to vocational school 5800 (20.34%) [0.31%] 5205 (19.60%) [0.32%]   
 bachelor degree or above 840 (2.99%) [0.14%] 748 (3.14%) [0.15%]   
Marital status   149.88 < 0.001
 without spouse 6322 (23.3%) [0.33%] 7661 (27.17%) [0.35%]   
 with spouse 25,417 (76.7%) [0.33%] 24,351 (72.83%) [0.35%]   
Occupation   4400 < 0.001
 unemployment 16,347 (49.96%) [0.36%] 8343 (26.39%) [0.34%]   
 agricultural work 7490 (21.91%) [0.29%] 10,473 (26.98%) [0.31%]   
 self-employed 1864 (7.08%) [0.20%] 3106 (10.83%) [0.24%]   
 employees 6042 (21.04%) [0.31%] 10,094 (35.8%) [0.37%]   
Self-rated health   7.75 < 0.01
 good 26,371 (85.44%) [0.24%] 26,860 (86%) [0.25%]   
 poor 5372 (14.56%) [0.24%] 5156 (14%) [0.25%]   
  1. aWeighted proportions accounting for sampling design were used to calculate proportions and standard errors
  2. *Person Chi2 test when comparing categories of characteristics between year 2010 and 2014