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Table 2 Baseline characteristics for individuals that were lost to follow-up and individuals that were analysed, and individuals in the treatment and placebo group

From: Patterns of soil-transmitted helminth infection and impact of four-monthly albendazole treatments in preschool children from semi-urban communities in Nigeria: a double-blind placebo-controlled randomised trial

  Individuals lost to follow-up
(N = 840)
Individuals analysed
(N = 388)
P Treatment Group
(N = 194)
Placebo Group
(N = 194)
P
Characteristic       
Age (months)       
12–23 287 (34.2%) 135 (34.8%) 0.336* 72 (37.1%) 63 (32.5%) 0.374*
24–35 187 (22.3%) 101 (26%)   46 23.7%) 55 (28.4%)  
36–47 194 (23.1%) 86 (22.2%)   39 (20.1%) 47 (24.2%)  
48–59 172 (20.5%) 66 (17%)   37 (19.1%) 29 (14.9%)  
Sex       
Male 443 (52.7%) 193 (49.7%) 0.329* 103 (53.1%) 90 (46.4%) 0.187*
Female 397 (47.3%) 195 (50.3%)   91 (46.9%) 104 (53.6%)  
Village       
Akinlalu 99 (11.8%) 86 (22.2%) 0.588* 43 (22.2%) 43 (22.2%) 0.562*
Ipetumodu 378 (45%) 157 (40.5%)   80 (41.2%) 77 (39.7%)  
Moro 160 (19%) 59 (15.2%)   33 (17%) 26 (13.4%)  
Edun-abon 203 (24.2%) 86 (22.2%)   38 (19.6%) 48 (24.7%)  
Socio-economic status       
Mean ± SE 6.49 ± 0.10 6.28 ± 0.06 0.077┼ 6.39 ± 0.13 6.59 ± 0.15 0.324┼
Parasitic infections       
Ascaris lumbricoides 409 (48.7%) 176 (45.4%) 0.277* 88 (45.4%) 88 (45.4%) 1*
Mean epg ± SE 1060.69 ± 91.70 1111 ± 149.53 0.581┼ 1095.19 ± 237.48 1126.81 ± 182.39 0.777┼
Trichuris trichiura 34 (4%) 12 (3.1%) 5 (2.6%) 7 (3.6%) 0.558*
Mean epg ± SE 5.16 ± 3.07 1.70 ± 1.05   0.81 ± 0.47 2.6 ± 2.06  
Hookworm 38 (4.5%) 15 (3.9%) 0.598* 5 (2.6%) 10 (5.2%) 0.188*
Mean epg ± SE 4.86 ± 1.47 3.41 ± 1.75   3.56 ± 2.91 3.26 ± 1.97  
Schistosoma haematobium 7 (.8%) 7 (1.8%) 0.153§ 3 (1.5%) 4 (2.1%)
Mean epg ± SE 0.02 ± 0.01 0.06 ± 0.02   0.06 ± 0.04 0.06 ± 0.03  
  1. * χ2 test
  2. ┼ t-test
  3. § Fisher's exact test