Skip to main content

Table 1 Baseline characteristics of the study participants

From: The dynamic of asymptomatic Plasmodium falciparum infections following mass drug administrations with dihydroarteminisin–piperaquine plus a single low dose of primaquine in Savannakhet Province, Laos

Characteristics

Early MDA-intervention villages

Deferred-MDA control villages

p-valuea

(N = 1060)

(N = 961)

Gender, n (%)

0.981

 Male

537 (51)

462 (51)

 

 Female

523 (49)

499 (49)

 

Age, median (IQR)

17 (8–32)

15 (6–30)

< 0.001

Age group (years), n (%)

0.644

 < 10

345 (33)

319 (35)

 

 10–19

241 (23)

204 (22)

 

 20–39

289 (27)

243 (27)

 

 40 or more

185 (17)

145 (16)

 

Occupation, n (%)

0.005

 Farmer

579 (55)

461 (51)

 

 Child

198 (19)

231 (25)

 

 Student

231 (22)

181 (20)

 

 Others

52 (5)

38 (4)

 

Type of resident, n (%)

0.783

 Permanent

1042 (98)

898 (99)

 

 Temporary

18 (2)

13 (1)

 

Villagers in village during the survey, n (%)

1036 (98)

883 (97)

 

Stay overnight in forest, n (%)

(n = 871)

(n = 810)

0.046

 No

766 (88)

732 (90)

 

 Yes, < 2 weeks ago

78 (9)

67 (8)

 

 Yes, ≥ 2 weeks

27 (3)

11 (1)

 

Weight (kg) median (IQR)

(n = 888)

(n = 811)

0.075

40 (19–49)

38 (18–46)

 

Height (cm), median (IQR)

(n = 886)

(n = 811)

< 0.001

144 (118–153)

143 (115–152)

 

Temperature (c), median (IQR)

(n = 888)

(n = 811)

< 0.001

36.9 (36.7–37.1)

36.9 (36.7–37.0)

 

Fever on registration date, (T ≥ 37.5 °C)

43 (5)

27 (3)

0.117

Feverb

120 (14)

146 (18)

0.011

Bed net use, n (%)

(n = 887)

(n = 811)

0.030

 Regular

498 (56)

506 (62)

 

 Irregular

322 (36)

249 (31)

 

 Never use

67 (8)

56 (7)

 

Asymptomatic Pf prevalence, n (%)

(n = 859)

(n = 802)

< 0.001

41 (4.8)

140 (17.4)

 

Pf clinical cases, n (%)

1 (0.1%)

2 (0.2%)

 

Pf densityc, geometric mean (95% CI)

10,864 (1676–20,795)

61,426 (42,542–88,693)

< 0.001

  1. Median (IQR) tested using Wilcoxon rank-sum test
  2. aN (%) tested using Chi square test or Fisher’s exact test (f)
  3. bHistory of fever combined with Temp ≥ 37.5
  4. cTest in log scale using Student’s test