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Table 1 Multivariate risk factor analysis of exposure to Rickettsia felis or R. typhi

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

  Population Exposed Coefficient (SE) t P OR (95% CI)
Constant    0.993 (0.291) 3.41 0.001  
Age
 20–39 years 64 42 0.106 (0.101) 1.051 0.295 1.112 (0.912–1.356)a
 40–59 years 42 24 Reference
 60+ years 23 6 -0.285 (0.133) -2.147 0.034 0.752 (0.579–0.975)
State
 SA or WA 12 5 Reference
 NSW or ACT 33 16 -0.040 (0.163) -0.244 0.808 0.961 (0.698–1.323)
 QLD 22 10 -0.046 (0.175) -0.263 0.793 0.955 (0.678–1.346)
 VIC or TAS 55 36 0.093 (0.157) 0.591 0.555 1.097 (0.807–1.493)
Recommends flea treatment to clients
 No 5 5 Reference
 Yes 123 66 -0.493 (0.242) -2.034 0.044 0.611 (0.38–0.982)
  1. Abbreviations: CI confidence interval, OR odds ratio, SE standard error
  2. aInterpretation: compared with participants from the reference category (those between the ages of 40–59), after adjusting for the effect of location (state) and whether they recommended flea treatment to clients, participants aged 60+ had a 1.330 (0.752-1; CI: 1.026–1.727) times lower odds of exposure