Table 3 Risk factors for malaria infection and severe malaria (2016–2018)

Age (years)

 <5

255 (10.6)

3371 (21.5)

1*

1

18 (30.6)

237 (10.1)

4.53 (2.25–9.12)

4.31 (2.12–8.77)

 5–14

549 (22.9)

3980 (25.4)

1.82 (1.56–2.13)

1.81 (1.55–2.12)

10 (16.9)

539 (23.0)

1.11 (0.49–2.48)

0.63 (0.17–2.37)

 15–24

689 (28.7)

3187 (20.4)

2.86 (2.46–3.33)

2.82 (2.42–3.28)

16 (27.1)

673 (28.7)

1.42 (0.70–2.89)

1.03 (0.40–2.66)

 ≥25

909 (37.8)

5121 (32.7)

2.35 (2.03–2.71)

2.40 (2.07–2.79)

15 (25.4)

894 (38.2)

1*

1

Sex

 Female

829 (34.5)

7273 (46.4)

1*

1

27 (45.8)

802 (34.2)

1

1

 Male

1573 (65.5)

8386 (53.6)

1.65 (1.50–1.80)

1.58 (1.43–1.73)

32 (54.2)

1,541 (65.8)

0.62 (0.37–1.04)

0.67 (0.38–1.14)

Seasonal variation

 Dry season (Jan–Apr)

367 (15.3)

2897 (18.5)

1*

1

25 (42.4)

733 (31.3)

1

1

 Rainy season (May–Sep)

1261 (52.5)

8483 (54.2)

1.17 (1.04–1.33)

1.17 (1.03–1.33)

21 (35.6)

990 (42.3)

0.62 (0.35–1.12)

0.69 (0.32–1.51)

 Cold season (Oct–Dec)

774 (32.2)

4279 (27.3)

1.43 (1.25–1.63)

1.20 (1.04–1.38)

13 (22.0)

620 (26.4)

0.62 (0.31–1.21)

0.54 (0.28–1.02)

Transportation conditions^a

 Good

692 (28.8)

9675 (61.8)

1*

1

20 (33.9)

922 (39.4)

1

1

 Poor

1710 (71.2)

5984 (38.2)

4.0 (3.64–4.39)

4.28 (4.25–5.31)

39 (66.1)

1,421 (60.6)

1.27 (0.73–2.18)

0.74 (0.18–1.62)

Parasite species

 P. falciparum

–

–

–

–

54 (91.5)

1,999 (85.3)

1.86 (0.74–4.68)

1.86 (0.73–4.75)

 P. vivax

–

–

–

–

5 (8.5)

344 (14.7)

1

1