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Table 2 Distribution of case–control sets (n = 138) according to exposure status, Cholera outbreak, Medipally, Andhra Pradesh, 2013

From: An outbreak of cholera in Medipally village, Andhra Pradesh, India, 2013

Exposure Number of case–control pairs Matched odds ratio 95 % Confidence interval  
  Concordant for exposure status Discordant for exposure status    
  All exposed All unexposed Case exposed Case unexposed    P
Gender 62 62 11 3 3.67 1.08- 6.36 0.06
Education-Illiterate 53 63 8 14 0.57 0.22- 1.35 0.14
Monthly family income < Rs 3000 31 71 19 17 1.12 0.57-2.17 0.87
Employment status unemployed 122 2 6 8 0.75 0.24-2.21 0.42
Drinking exclusive Overhead tank water 56 22 58 2 29.00 8.45- 176.71 0.00
Presence of house flies 69 38 22 9 2.44 1.14- 5.58 0.03
< Mean household members (4) 59 16 22 41 0.54 0.31- 0.89 0.01
Attended fair 0 129 7 2 3.50 0.77- 24.58 0.18
Practices        
Regularly drink boiled water 6 76 8 48 0.17 0.07- 0.33 0.01
Wash hands before eating 46 34 11 47 0.23 0.11- 0.44 0.01