Table 2 Risk factors associated with post-primary, opposed to primary, active dengue immune status

 < 5

1

 6–15

1.69

1.46–1.96

< 0.001

 16–30

1.80

1.53–2.11

< 0.001

 > 31

1.91

1.54–2.38

< 0.001

 Female

1

 Male

0.94

0.85–1.04

0.248

 1–2

1

 3–4

1.06

0.94–1.19

0.377

 5

1.00

0.84–1.19

0.973

 No warning signs

1

 Warning signs

1.47

1.28–1.70

< 0.001

 Severe

1.66

1.28–2.16

< 0.001

 Non-disclosed

0.90

0.76–1.07

0.227

 0–75

1

 75–150

0.81

0.67–0.97

0.023

 150+

0.61

0.52–0.72

< 0.001

 0–100

1

 100–200

0.87

0.77–0.97

0.017

 200+

1.32

1.14–1.53

< 0.001