Table 4 Factors associated with sub-microscopic parasitaemia if parasitaemic, stratified by study site

Age groups (years)

0.5– <2

14/18 (77.8 %)

1.22 (0.94–1.58)

0.14

23/34 (67.7 %)

0.95 (0.75–1.22)

0.71

70/97 (72.2 %)

1.11 (0.96–1.29)

0.15

2– <5

81/126 (64.3 %)

1.09 (0.89–1.33)

0.41

146/206 (70.9 %)

1.00 (0.90–1.12)

0.95

243/401 (60.6 %)

1.02 (0.91–1.13)

0.77

5– <11

95/165 (57.6 %)

Reference group

336/485 (69.3 %)

Reference group

533/933 (57.1 %)

Reference group

≥18

99/119 (83.2 %)

1.43 (1.20–1.71)

<0.001

140/163 (85.9 %)

1.25 (1.13–1.38)

<0.001

354/393 (90.1 %)

1.65 (1.53–1.79)

<0.001

Symptomatic malaria in prior 30 days

No

263/399 (65.9 %)

Reference group

537/761 (70.6 %)

Reference group

987/1562 (63.2 %)

Reference group

Yes

26/29 (89.7 %)

1.36 (1.17–1.58)

<0.001

108/127 (85.0 %)

1.27 (1.15–1.40)

<0.001

213/262 (81.3 %)

1.42 (1.31–1.55)

<0.001