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Table 2 Prevalence of anemiaa among adults aged 50 years and older, SAGE China Wave 1

From: Association between anemia and frailty in 13,175 community-dwelling adults aged 50 years and older in China

 Men (n = 5044)Women (n = 5482)Total (n = 10,526)
%95%CI%95%CI%95%CI
Total31.7[29.0, 34.5]30.3[27.3, 33.5]31.0[28.4, 33.8]
Age
 50–5926.5[22.7, 30.7]29.4[26.2, 32.8]27.9[24.7, 31.2]
 60–6930.2[26.2, 34.4]29.8[26.2, 33.7]30.0[26.8, 33.5]
 70–7938.5[33.4, 43.8]37.8[33.2, 42.5]38.1[33.7, 42.7]
 80+43.8[36.2, 51.7]38.9[31.1, 47.4]41.2[35.5, 47.1]
 F9.628 3.231 4.221 
 P< 0.001 0.006 0.002 
Residence
 Urban48.5[42.6, 54.5]44.3[39.9, 48.8]46.3[41.5, 51.2]
 Rural18.3[15.7, 21.2]20.7[17.6, 24.0]19.4[16.8, 22.2]
 F94.443 59.367 76.318 
 P< 0.001 < 0.001 < 0.001 
Education
 No formal education33.0[28.0, 38.4]35.4[31.6, 39.5]34.7[31.2, 38.5]
 Less than primary27.1[22.3, 32.6]29.9[25.8, 34.3]28.5[24.6, 32.7]
 Primary school completed29.8[24.8, 35.3]33.7[29.6, 38.2]31.4[27.3, 35.7]
 Secondary school completed32.9[27.9, 38.4]28.5[23.6, 33.9]31.2[26.8, 35.9]
 High school completed29.4[20.5, 40.4]27.5[21.2, 34.8]28.6[21.5, 37.1]
 College completed and above29.5[17.8, 44.8]20.0[12.2, 31.0]26.1[16.2, 39.1]
 F0.515 3.862 4.656 
 P0.653 < 0.001 < 0.001 
Wealth Quintile
 Q1(Lowest)26.0[21.9, 30.6]33.5[28.8, 38.6]29.8[26.0, 33.9]
 Q229.0[25.1, 33.3]31.0[26.3, 36.1]30.0[26.1, 34.2]
 Q329.0[24.7, 33.6]30.4[26.6, 34.5]29.7[26.2, 33.4]
 Q425.9[21.2, 31.2]28.2[24.4, 32.2]27.0[23.1, 31.2]
 Q5(Highest)42.3[35.3, 49.7]36.9[32.1, 42.0]39.7[34.1, 45.5]
 F8.557 4.624 7.400 
 P< 0.001 < 0.001 < 0.001 
  1. aWeighted results