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Table 1 Baseline characteristics of children included in the trial by randomization group (n = 765)

From: The impact of anthelmintic treatment intervention on malaria infection and anaemia in school and preschool children in Magu district, Tanzania: an open label randomised intervention trial

Variable Intervention group (n = 394) Control group (n = 371)
Sex   
 Boys (n = 392) 193 (49.0%) 180 (48.5%)
 Girls (n = 373) 201 (51.0%) 191 (49.0%)
Age distribution (years)   
 3 – 5 (n = 93) 40 (10.1%) 53 (14.3%)
 6 – 8 (n = 517) 278 (70.6%) 239 (64.4%)
 9 – 13 (n = 155) 76 (19.3%) 79 (21.3%)
School   
 Mwamayombo 52 (51.5) 49 (48.5)
 Nyashimo 85 (50.6) 83 (49.4)
 Bulima 68 (50.7) 66 (49.3)
 Milambi 56 (53.8) 48 (46.2)
 Ihale 75 (51.4) 71 (48.6)
 Ijitu 58 (51.8) 54 (48.2)
 All schools 394 (51.5) 371(48.5)
S. mansoni infection   
 Prevalence (%) 238 (60.4) 220 (59.3)
 Intensity (Epg)* 49 (42–59) 50 (42–59)
S. haematobium infection   
 Prevalence (%) 90 (22.8) 85 (22.9)
 Intensity (Eggs/10 ml)* 15 (11–20) 17 (13–23)
S. mansoni/S. haematobium co-infection   
 Prevalence (%) 65 (16.6) 61 (16.4)
S. mansoni intensity (Epg)* 31 (23–42) 41 (29–58)
S. haematobium intensity (egg/10 ml)* 19 (11–28) 16 (10–26)
Malaria infection   
 Prevalence (%) 123 (31.2) 123 (33.2)
 Parasite density (mps/μL)* 530 (414–676) 510 (403–644)
Hookworm infection   
 Prevalence (%) 80 (20.3) 68 (18.3)
 Intensity (Epg)* 54 (39–76) 53 (39–73)
Prevalence of anaemia (%) 142 (36.7) 134 (35.5)
Prevalece of severe anaemia (%) 5 (1.3) 4 (1.1)
Mean haemoglobin level (g/L)** 122 (121–123) 123 (122–124)
Multiple infections (%)   
 Single parasite 199 (50.5) 186 (50.1)
 Two parasites 148 (37.6) 136 (36.7)
 Thee/four parasites 47 (12.0) 49 (13.2)
  1. *Infection intensity expressed as geometric mean parasite counts of positive samples only with 95% confidence interval shown in brackets.
  2. **Mean haemoglobin concentrations with 95% confidence interval shown in brackets.