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Table 2 Proportions of children infected with hookworm and Ascaris lumbricoides, and average intensity of infections at baseline and 15 months after treatment (n = 1141), by treatment group

From: Impact of single annual treatment and four-monthly treatment for hookworm and Ascaris lumbricoides, and factors associated with residual infection among Kenyan school children

  Proportion infected, % (95% CI) Intensity of infection, epg (95% CI)
Treatment group Single Four-monthly Single Four-monthly
Hookworm
 Baseline (Feb–Jun 2013) 58.7 (50.3–68.5) 59.9 (52.5–68.4) 111 (67–185) 180 (98–330)
 15-month follow-up (Sept 2014) 18.3 (14.4–23.3) 5.7 (4.2–7.7) 126 (47–336) 7 (3–15)
 Relative reduction (%) 68.8 90.5 Increase: 13.5 96.1
Odds ratio (95% CI) 0.09 (0.07–0.13) 0.02 (0.01–0.04) 0.59 (0.31–1.14) 0.03 (0.02–0.07)
P 1 <0.001 <0.001 0.116 <0.001
A. lumbricoides
 Baseline (Feb–Jun 2013) 56.7 (46.7–66.4) 55.7 (47.9–66.9) 3 234 (2 539–4 119) 2 606 (1 968–3 449)
 15-month follow-up (Sept 2014) 23.3 (17.6–30.8) 6.2 (3.7–10.5) 2 504 (1 717–3 651) 117 (56–244)
 Relative reduction (%) 58.9 88.7 22.6 95.5
 Odds ratio (95% CI) 0.09 (0.06–0.13) 0.01 (0.01–0.03) 0.64 (0.57–1.10) 0.01 (0.01–0.04)
P 1 <0.001 <0.001 0.095 <0.001
  1. 1 P-values were obtained using mixed-effect logistic and negative binomial regression analyses with random intercepts for schools