Table 1 Characteristics of study participants by study site and year

Number of participants

629

535

787

758

804

920

Female gender, n (%)

348 (55.3 %)

302 (56.5 %)

442 (56.2 %)

422 (55.7 %)

471 (58.6 %)

508 (55.2 %)

Median age in years (IQR^a)

12 (5–25)

14 (5–25)

12 (5–28)

13 (5–26)

11 (6–28)

11 (5–25)

Age categories, n (%)

 <5 years

154 (24.5 %)

130 (24.3 %)

183 (23.3 %)

162 (21.4 %)

158 (19.7 %)

195 (21.2 %)

 5–15 years

214 (31.0 %)

150 (28.0 %)

281 (35.7 %)

277 (36.5 %)

343 (42.7 %)

409 (44.5 %)

 >15 years

261 (41.5 %)

255 (47.7 %)

323 (41.0 %)

319 (42.1 %)

303 (37.7 %)

316 (34.4 %)

ITN use^b, n (%)

252 (40.1 %)

196 (36.6 %)

248 (31.5 %)

178 (23.5 %)

423 (52.6 %)

418 (45.4 %)

Geometric mean parasite density/µL^c

430

656

827

2187

908

1880

Parasite ranges

16–32,800

48–19,200

16–74,240

16–98,680

16–139,480

16–188,080

Parasite species by thin smear^c

 P. falciparum

91.7 %

92.3 %

92.4 %

82.1 %

95.7 %

93.2 %

 P. falciparum + P. malariae

2.8 %

7.7 %

3.3 %

10.4 %

1.4 %

6.6 %

 P. falciparum + P. ovale

0

0

0

0

1.4 %

0

 P. malariae

5.6 %

0

4.3 %

7.5 %

1.1 %

0.3 %

 P. ovale

0

0

0

0

0.3 %

0

Gametocytes present, n (%)

15 (2.4 %)

13 (2.4 %)

13 (1.7 %)

16 (2.1 %)

107 (13.3 %)

95 (10.3 %)