|  | Proportion infected | Intensity of infection | ||||
---|---|---|---|---|---|---|---|
Variable | Categories | Odds ratio (95% CI) | P | Adjusteda odds ratio (95% CI) | Adjusted P | Epg ratio (95% CI) | P |
Child characteristics | |||||||
 Sex | Male | 1 |  | 1 |  | 1 |  |
Female | 0.79 (0.39–1.61) | 0.510 | 0.79 (0.38–1.61) | 0.510 | 0.65 (0.09–4.93) | 0.683 | |
 Age group | 5–8 | 1 |  | 1 |  | 1 |  |
9–10 | 1.06 (0.43–2.65) |  | 1.07 (0.43–2.65) |  | 0.53 (0.03–8.27) |  | |
11–12 | 0.66 (0.24–1.84) | 0.781 | 0.66 (0.24–1.84) | 0.752 | 0.18 (0.01–3.02) | 0.650 | |
13–15 | 0.80 (0.29–2.23) |  | 0.80 (0.29–2.24) |  | 0.54 (0.03–9.30) |  | |
 Anaemia | Yes | 1.23 (0.59–2.57) | 0.572 | 1.42 (0.68–2.95) | 0.354 | 2.85 (0.34–23.52) | 0.328 |
 Thin | Yes | 1.53 (0.58–2.50) | 0.703 | 1.48 (0.56–3.88) | 0.441 | 1.33 (0.06–31.92) | 0.859 |
 Stunted | Yes | 1.16 (0.54–1.51) | 0.989 | 1.13 (0.52–2.42) | 0.763 | 1.99 (0.21–18.49) | 0.527 |
 Underweight | Yes | 0.74 (0.09–6.00) | 0.766 | 0.62 (0.08–4.98) | 0.628 | 7.51 (0.03–1923.72) | 0.319 |
 Baseline infection | |||||||
   A. lumbricoides infection | Yes | 4.37 (1.62–11.82) | 0.001 | 3.66 (1.36–9.90) | 0.010 | 2.36 (0.24–23.45) | 0.467 |
   A. lumbricoides intensity | 0 | 1 |  | 1 |  | 1 |  |
1–4 999 | 3.77 (1.34–10.61) | 0.003 | 0.62 (0.28–1.39) | 0.259 | 2.88 (0.33–25.16) | 0.617 | |
> = 5 000 | 6.02 (1.96–18.46) |  | 1 |  | 2.78 (0.16–49.85) |  | |
Household characteristics | |||||||
 Socioeconomic status | Poor | 1 |  | 1 |  | 1 |  |
Less poor | 0.98 (0.86–1.11) | 0.736 | 0.98 (0.86–1.11) | 0.736 | 1.08 (0.13–8.99) | 0.941 | |
 Water source | Not covered | 1 |  | 1 |  | 1 |  |
Covered | 0.61 (0.11–3.12) | 0.570 | 0.61 (0.11–3.12) | 0.570 | 1.64 (0.03–905.05) | 0.883 | |
 Floor | Mud | 1 |  | 1 |  | 1 |  |
Cemented | 0.55 (0.07–4.39) | 0.545 | 0.55 (0.07–4.39) | 0.545 | 1.82 (0.03–130.16) | 0.764 | |
 Pit latrine | No | 1 |  | 1 |  | 1 |  |
Yes | 1.75 (0.49–6.25) | 0.359 | 1.75 (0.49–6.25) | 0.359 | 2.20 (0.10–50.24) | 0.656 | |
School characteristics | |||||||
 Baseline school infection level | |||||||
   A. lumbricoides prevalence | <27% | 1 |  | 1 |  | 1 |  |
28–30% | 4.02 (1.47–14.55) |  | 4.04 (1.08–15.16) |  | 4.02 (0.34–47.00) | 0.630 | |
>40% | 0.60 (2.62–21.89) | 0.019 | 0.60 (1.57–19.54) | 0.011 | 5.61 (0.51–61.74) |  | |
   A. lumbricoides epg | 366–913 | 1 |  | 1 |  | 1 |  |
914–2 497 | 2.00 (0.63–6.33) | 0.095 | 2.00 (0.63–6.33) | 0.095 | 1.26 (0.11–14.12) | 0.878 | |
>2 497 | 3.48 (1.17–10.36) |  | 3.38 (1.17–10.36) |  | 2.27 (0.19–27.90) |  | |
  Latrine cleanliness | Clean | 1 |  | 1 |  | 1 |  |
Dirty | 0.53 (0.20–1.41) | 0.049 | 0.48 (0.21–1.21) | 0.030 | 0.17 (0.01–1.88) | 0.446 | |
Very dirty | 0.18 (0.04–0.86) |  | 0.21 (0.05–0.92) |  | 0.23 (0.02–3.09) |  | |
  Children per latrine | <50:1 | 1 |  | 1 |  | 1 |  |
>50:1 | 0.74 (0.27–2.04) | 0.554 | 0.74 (0.27–2.04) | 0.554 | 1.21 (0.16–9.11) | 0.852 | |
Environmental characteristics | |||||||
 Elevation |  | 1.04 (0.99–1.01) | 0.402 | 1.01 (1.00–1.03) | 0.040 | 1.00 (0.98–1.03) | 0.991 |
 LST (oC) | 18.0–19.9 | 1 |  | 1 |  | 1 |  |
20.0–20.7 | 0.49 (0.21–1.12) | 0.396 | 2.16 (0.62–7.55) | 0.112 | 0.31 (0.03–3.63) | 0.260 | |
20 | 0.21 (0.05–0.92) |  | 3.08 (0.97–9.80) |  | 1.23 (0.08–17.9) |  | |
 NDVI | 0.47–0.53 | 1 |  | 1 |  | 0.02 (0.00–1.45) | 0.761 |
0.54–0.57 | 1.33 (0.34–5.21) | 0.959 | 2.22 (0.71–6.92) | 0.345 |  |  | |
0.58–0.67 | 1.67 (0.43–6.51) |  | 1.63 (0.63–4.23) |  |  |  | |
 Distance from water bodies |  | 0.82 (0.40–1.70) | 0.586 | 0.84 (0.24–2.99) | 0.793 | 0.21 (0.00–22.94) | 0.505 |