Table 1 Prevalence of S.mansoni infection among the school children in Amhara Regional State, Ethiopia
Variable | Number examined | Prevalencea (95% CI) | Univariate COR (95% CI) | P value | Multivariate AOR (95% CI) | P value |
|---|---|---|---|---|---|---|
Overall | 798 | 25.6 (22.5-28.6) | Â | Â | Â | Â |
 Age (years). | ||||||
  6-8 | 184 | 20.6 (14.8-26.4) | 1 |  |  |  |
  9-11 | 377 | 29.2 (24.6-33.8) | 0.84 (0.53-1.34) | 0.467 | 0.94 (0.57-1.56) | 0.816 |
  12-15 | 237 | 23.6 (18.2-29.0) | 1.33 (0.92-1.93) | 0.132 | 1.29 (0.86-1.94) | 0.212 |
 Gender |  |  |  |  |  |  |
  Male | 419 | 28.4 (23.9-32.7) | 0.73 (0.53-1.01) | 0.054 | 0.82 (0.58-1.15) | 0.250 |
  Female | 379 | 22.4 (18.2-26.6) | 1 |  |  |  |
 Uncooked vegetable consumption | ||||||
  Yes | 456 | 25.9 (21.9-29.9) | 1.04 (0.75-1.43) | 0.825 |  |  |
  No | 342 | 25.1 (20.5-29.7) | 1 |  |  |  |
 Source of drinking water | ||||||
  Unimproved | 496 | 27.0 (23.1-30.9) | 1.23 (0.88-1.71) | 0.229 |  |  |
 Improved | 302 | 23.2 (18.4-27.9) | 1 |  |  |  |
 Washing clothes | ||||||
  Yes | 350 | 29.1 (24.3-33.8) | 1.39 (1.01-1.92) | 0.041 | 1.31 (0.93-1.85) | 0.125 |
  No | 448 | 22.8 (18.9-26.7) | 1 |  | 1 |  |
 Fetching water |  |  |  |  |  |  |
  Yes | 385 | 29.6 (25.1-34.2) | 1.51 (1.09-2.08) | 0.012 | 1.32 (0.93-1.86) | 0.117 |
  No | 413 | 21.8 (17.8-26.7) | 1 |  | 1 |  |
 Water body contact while crossing | ||||||
  Yes | 162 | 24.1 (17.5-30.7) | 0.91 (0.61-1.35) | 0.626 |  |  |
  No | 636 | 25.9 (22.5-29.3) | 1 |  |  |  |
 Swimming in rivers | ||||||
  Yes | 372 | 29.6 (24.9-34.2) | 1.48 (1.08-2.04) | 0.016 | 1.79 (1.22-2.62) | 0.003 |
  No | 426 | 22.1 (18.2-26.0) | 1 |  | 1 |  |
 Bathing in open freshwater bodies | ||||||
  Yes | 290 | 30.7 (25.4-36.0) | 1.51 (1.09-2.09) | 0.012 | 2.02 (1.39-2.94) | <0.001 |
  No | 508 | 22.6 (18.9-26.2) | 1 |  | 1 |  |
 Participating in irrigation farming | ||||||
  Yes | 362 | 30.4 (25.7-35.1) | 1.59 (1.15-2.19) | 0.005 | 1.69 (1.19-2.39) | 0.004 |
  No | 436 | 21.6 (17.7-25.4) | 1 |  | 1 |  |
 Ownership domestic animals | ||||||
  Yes | 769 | 26.0 (22.9-29.2) | 2.19 (0.75-6.39) | 0.149 |  |  |
  No | 29 | 13.8 (12.5-26.3) | 1 |  |  |  |
 School | ||||||
  Addis Mender | 161 | 39.7 (32.2-47.2) | 3.12 (1.51-6.43) | 0.002 | 2.56 (1.20-5.46) | 0.015 |
  Harbu | 160 | 38.1 (30.6-45.6) | 2.91 (1.41-6.01) | 0.004 | 3.53 (1.64-7.59) | 0.001 |
  Avia Kokit | 125 | 12.8 (5.6-20.0) | 0.69 (0.30-1.60) | 0.391 | 0.79 (0.33-1.91) | 0.604 |
  Robite | 156 | 18.6 (12.5-24.7) | 1.08 (0.50-2.32) | 0.845 | 0.72 (0.32-1.61) | 0.419 |
  Zengaj Robit | 133 | 17.3 (10.9-23.7) | 0.99 (0.45-2.18) | 0.977 | 0.84 (0.37-1.91) | 0.672 |
  Wawa | 63 | 17.5 (8.1-26.9) | 1 |  | 1 |  |