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Table 1 Influenza vaccination coverage rates in 2008/2009, 2009/2010, and 2010/2011

From: Influenza vaccination coverage rates among adults before and after the 2009 influenza pandemic and the reasons for non-vaccination in Beijing, China: A cross-sectional study

  season 2008/2009 season 2009/2010 season 2010/2011
  Weighted % (95% CI) Weighted % (95% CI) Weighted % (95% CI)
Gender    
 male 16.3 (15.3-17.2) 21.3 (20.2-22.3) 16.0 (15–16.9)
 female 17.6 (16.7-18.5) 22.3 (21.3-23.3) 17.5 (16.5-18.4)
χ 2 0.61 0.004 0.69
 p value 0.437 0.953 0.407
Age (years)    
 18~29 13.7 (12.4-15) 18.7 (17.2-20.1) 12.3 (11–13.5)
 30~39 13 (11.7-14.3) 16 (14.6-17.4) 11.4 (10.2-12.6)
 40~49 13.3 (12–14.6) 17.2 (15.6-18.6) 11.6 (10.4-12.8)
 50~59 15.3(13.9-16.6) 19.5 (18–21) 14.9 (13.6-16.2)
 ≥60 36.3 (34.5-38.2) 46 (44.1-48) 43.1(41.1-45)
χ 2 729.45 973.10 1340.82
 p value <0.001 <0.001 <0.001
Educational level    
 illiteracy 32.9 (28.2-37.6) 43.3 (38.3-48.2) 40.4 (35.5-45.3)
 primary school 24.6 (22.3-26.8) 33.7 (31.2-36.2) 30.7 (28.3-33.1)
 junior high school 16.1 (14.9-17.3) 20.6 (19.3-21.9) 17.5 (16.3-18.8)
 senior high school 15.5 (14.4-16.7) 20.0 (18.7-21.3) 15.2 (14.1-16.4)
 3 year college graduate or above 18.5 (17.2-19.7) 23.5 (22.1-24.8) 16.2 (15–17.3)
χ 2 123.62 208.65 303.16
 p value <0.001 <0.001 <0.001
Population density    
 urban 17.7 (16.7-18.7) 22 (21–23) 16.6 (15.7-17.6)
 suburban 15.6 (14.7-16.5) 21.5 (22.3-24.3) 16.8 (15.9-17.8)
χ 2 7.96 0.01 0.537
 p value 0.005 0.925 0.464
Total 16.9 (16.2-17.5) 21.8 (21.1-22.5) 16.7 (16.1-17.4)