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Table 1 Seroprevalence of pandemic (H1N1) 2009 in cats in different cities in northeastern China

From: Serological report of pandemic (H1N1) 2009 infection among cats in Northeastern China in 2012-02 and 2013-03

City Roaming cats   Pet cats  
No. examined Seroprevalence (%) OR(95%CI)a No. examined Seroprevalence (%) OR(95% CI)a
   NT HI    NT HI  
Haerbin 120 20.8%(25/120) 21.7%(26/120) Reference 165 36.4%(60/165) 34.5%(57/165) Reference
Changchun 120 23.3%(28/120) 20.8%(25/120) 1.05[0.57-1.95] 165 32.7%(54/165) 28.5%(47/165) 1.37[0.86-2.18]
Shenyang 120 0 (0/120) 0 (0/120) 67.58[4.06-1124] 165 27.9%(49/165) 30.3%(50/165) 1.21[0.76-1.93]
Dalian 120 0 (0/120) 0 (0/120) 67.58[4.06-1124] 165 23.6%(39/165) 21.2%(35/165) 1.96[1.20-3.20]
Total 480 11%(53/480) 10.7%(51/480)   660 30.6%(202/660) 28.0%(189/660)  
OR(95% CI)b   Reference Reference    0.28[0.20-0.39] 0.30[0.21-0.41]  
  1. aThe statistical tests about the association between different cities in HI tests.
  2. bThe statistical tests about the association between roaming and pet cats;OR, odds ratio; CI, confidence intervals.