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Table 3 Adverse pregnancy outcomes associated with Q fever seropositivity in bivariate analysis, among 1112 parturient women, Reunion island, January to July 2014

From: Q fever seroprevalence in parturient women: the EQRUN cross-sectional study on Reunion Island

AdverseExposure variable:Coxiella burnetiiPhase 2 IgG ≥ 1:64
pregnancy outcomesnCrude %Crude PPR95% CIP value
Composite outcomea    0.567
In seropositive52 / 20325.60.930.71–1.20 
In seronegative251 / 90927.51  
Preterm birth    0.775
In seropositive11 / 2035.40.910.48–1.71 
In seronegative54 / 9095.91  
Small-for-gestational age   0.823
In seropositive41 / 20320.20.970.71–1.31 
In seronegative190 / 90920.91  
Exposure variable: Coxiella burnetiiPhase 2 IgG ≥ 1:256 or Phase 2 IgM ≥ 1:48
Composite outcomea    0.801
In seropositive13 / 4528.91.060.66–1.70 
In seronegative290 / 106727.21  
Preterm birth    0.319
In seropositive1 / 452.20.370.05–2.61 
In seronegative64 / 10676.01  
Small-for-gestational age   0.897
In seropositive9 / 4520.00.960.53–1.74 
In seronegative222 / 106720.81  
  1. Data are numbers, crude seropositive rates (%), crude prevalence proportion ratios (PPR) and 95% confidence intervals (95% CI). NA: not assessed. P values are given for Wald tests and not for crude Pearson chi2 tests
  2. aRecurrent miscarriage, stillbirth, or preterm birth, small-for-gestational age, congenital malformations, oligohydramnios or polyhydramnios