Table 2 Odds ratios (ORs) for risk factors for Zika positivity (n = 47) versus non-positivity (n = 384).

From: Sero-epidemiological study of arbovirus infection following the 2015–2016 Zika virus outbreak in Cabo Verde

Risk factor

Zika non +ve

N (median)

Zika non +ve

%

(range)

Zika +ve

N (median)

Zika +ve

%

(range)

OR

95% CI

P-value

AOR

95% CI

P-value

Age (years)

34

20–72

39

23–63

1.025

0.998–1.051

0.068

1.029

1.000–1.060

0.048

Male vs. female

239

62.2

33

70.2

0.699

0.352–1.325

0.287

0.654

0.314–1.361

0.256

Praia vs. other

301

80.2

39

83.0

1.199

0.564–2.860

0.658

–

–

–

Any Zika symptoms*

27

7.0

2

4.3

0.588

0.093–2.053

0.478

–

–

–

Dengue +ve

35

9.1

19

40.4

6.766

3.409–13.326

3.3 × 10−8

6.783

3.128–15.101

1.6 × 10−6

Yellow fever +ve

1

0.3

0

0

–

–

–

–

–

–

Chikungunya +ve

8

2.1

3

6.4

3.205

0.998–1.051

0.094

–

–

–

Self-reported Zika

18

4.7

11

23.4

6.213

2.660–14.043

1.4 × 10−5

4.889

1.913–12.493

9.1 × 10−4

Self-reported dengue

80

20.8

12

25.5

1.303

0.998–1.051

0.046

0.671

0.292–1.546

0.349

  1. AOR adjusted odds ratios estimated by a multivariate model that includes all listed risk factors, CI confidence intervals; *a rash, myalgia, nausea, or fever.
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