Table 2 Univariable analyses showing significant indicators and unadjusted odds ratios of dengue positive patients compared to non-dengue patients identified in the passive surveillance in Medellin

Female (ref. male)

0.95

0.65–1.39

0.795

Age (years)

0.867

 1–4

Ref

–

 5–9

0.94

0.52–1.71

 10–24

1.79

0.65–1.90

 25–45

2.00

0.72–2.34

 45–65

1.62

0.55–1.92

Treated at IPD (ref. OPD)

2.57

1.05–6.29

0.040

No/unknown yellow fever vaccination (ref. vaccinated)

1.67

1.14–2.46

0.009

Fever duration prior to visit

0.002

 1–2 days

Ref

–

 3–4 days

0.69

0.44–1.09

 5–7 days

1.60

0.99–2.58

Clinical diagnosis

0.176

 Undifferentiated fever

Ref

–

 Suspected dengue

1.82

0.57–5.83

 Non-dengue

3.40

0.75–15.37

Temperature ≥ 38.0°c at presentation (ref. <  38.0°c)

0.79

0.52–1.22

0.287