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Table 2 Factors independently associated with spotted fever group Rickettsiae (SFGR) seropositivity in multivariate analysis, Reunion island, 2009 (n = 241)

From: Seroprevalence of typhus group and spotted fever group Rickettsia exposures on Reunion island

Rickettsia rickettsii IgG  1:64
Variables n % Adjusted PPR 95% CI
Age
 < 20 years 0/24 0.00 NA**  
 20–39 years 13/77 18.84 1
 40–59 years 23/102 21.88 1.22 0.55–2.69
 ≥ 60 years 9/38 21.91 1.20 0.46–3.15
Gender
 Female 25/136 17.92 1.05 0.61–1.82
 Male 20/105 16.61 1  
Microregion
 North 2/17 14.63 1.62 0.30–8.72
 South 6/80 5.73 1
 West 26/78 30.07 3.61* 1.32–9.87
 East 11/66 17.01 2.10 0.68–6.42
  1. Data are numbers (n), weighted seropositive rates (%), adjusted prevalence proportion ratios (PPR), and 95% confidence intervals (95% CI)
  2. NA not assessed
  3. P values linked to variable names are given for overall design-based Pearson chi2 tests
  4. P values linked to PPR are given for within-each-category Wald tests
  5. P < 0.05
  6. ** P < 0.01