Table 5 Factors associated with infection in pregnant women (n = 3,008).

From: Factors associated with infection and hospitalization of Zika cases during the 2016–2018 outbreak in Mexico

Variable

Total

n (%)

Positive

Negative

Wald

Chi-square

p value

AOR (95% CI)

n (%)

n (%)

Age

 ≥ 30

980 (32.6)

234 (30.2)

746 (33.4)

3.22

0.073

0.85 (0.71–1.02)

 ≤ 29.9

2,028 (67.4)

540 (69.8)

1,488 (66.6)

 

Ref.

 

Stage of gestation

      

 First trimester

720 (23.9)

180 (23.3)

540 (24.2)

19.76

< 0.001*

1.71 (1.35–2.17)

 Second trimester

1,281 (42.6)

428 (55.3)

853 (38.2)

81.82

< 0.001*

2.55 (2.08–3.13)

 Third trimester

1,007 (33.5)

166 (21.4)

841 (37.6)

 

Ref.

 
  1. *Indicates significant p value < 0.05. Binary logistic regression analysis adjusted for age and stage of gestation. CI, confidence interval; AOR, adjusted odd ratio; Ref., reference group. Data collected during the Zika outbreak in Mexico from August 2016 to January 2018 confirmed with RT-qPCR assays at the epidemiological surveillance laboratory network of the Mexican Social Security Institute.
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