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Table 2 Frequency of influenza vaccination 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

  Frequency of influenza vaccination Weighted % (95% CI) χ2 p value
  0 1 2 3   
Gender       
 male 71.1 (70–72.2) 13.5 (12.7-14.3) 6.2 (5.6-6.8) 9.3 (8.5-10.1) 0.35 0.555
 female 68.7 (67.6-69.8) 14.8 (14–15.6) 6.9 (6.3-7.5) 9.6 (8.9-10.3)   
Age (years)       
 18~29 73 (71.3-74.7) 15.4 (14–16.8) 5.6 (4.7-6.5) 6.1 (5.2-7) 1453.47 <0.001
 30~39 75.8 (74.1-77.5) 13.7 (12.4-15) 5 (4.2-5.8) 5.6 (4.7-6.5)   
 40~49 74.9 (73.2-76.6) 13.8 (12.5-15.1) 5.6 (4.7-6.5) 5.7 (4.8-6.6)   
 50~59 72.8 (71.1-74.5) 13 (11.7-14.3) 6.1 (5.2-7) 8.1 (7.1-9.1)   
 ≥60 45 (43.1-46.9) 13.5 (12.2-14.8) 12.6 (11.3-13.9) 28.9 (27.1-30.7)   
Educational level       
 illiteracy 49.2 (44.2-54.2) 13.2 (9.8-16.6) 9.3 (6.4-12.2) 28.2 (23.7-32.7) 309.50 <0.001
 primary school 57.6 (55–60.2) 14.2 (12.4-16) 9.9 (8.3-11.5) 18.3 (16.3-20.3)   
 junior high school 71 (69.5-72.5) 13.5 (12.4-14.6) 5.8 (5–6.6) 9.7 (8.7-10.7)   
 senior high school 71.8 (70.3-73.3) 14 (12.9-15.1) 5.7 (5–6.4) 8.4 (7.5-9.3)   
 3 year college graduate or above 68.4 (66.9-69.9) 14.5 (13.4-15.6) 7.7 (6.9-8.5) 9.4 (8.5-10.3)   
Population density       
 urban 69.8 (68.7-70.9) 13.7 (12.9-14.5) 6.9 (6.3-7.5) 9.6 (8.8-10.4) 7.59 0.055
 suburban 70.2 (69.1-71.3) 14.7 (13.8-15.6) 5.9 (5.3-6.5) 9.1 (8.4-9.8)   
Total 70 (69.2-70.8) 14.1 (13.5-14.7) 6.5 (6.1-6.9) 9.4 (8.9-9.9) - -
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