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Table 2 Multivariate risk factor analysis of exposure to Rickettsia felis

From: Serological evidence of exposure to Rickettsia felis and Rickettsia typhi in Australian veterinarians

  Population Exposed Coefficient (SE) t P OR (95% CI)
Constant    0.111 (0.177) 0.625 0.534  
Age
 20–39 years 34 12 0.033 (0.112) 0.294 0.769 1.033 (0.83–1.286)
 40–59 years 27 9 Reference
 60+ years 17 0 -0.28 (0.134) -2.095 0.04 0.756 (0.582–0.982)
State
 SA or WA 7 0 Reference
 NSW or ACT 21 4 0.132 (0.185) 0.716 0.477 1.142 (0.794–1.641)
 QLD 15 3 0.151 (0.194) 0.78 0.438 1.163 (0.796–1.699)
 VIC or TAS 32 13 0.323 (0.179) 1.808 0.075 1.381 (0.973–1.96)
  1. Abbreviations: CI confidence interval, OR odds ratio, SE standard error