Table 4: Multivariate analysis for factors potentially associated with Schistosoma  mansoni infection among Sanja General Elementary School children, northwest Ethiopia, 2013.

Risk factorsSchistosoma  mansoni number (%)OR (95% CI) value
PositiveNegativeTotal COR AOR

Sex
 Male119 (90.2)13 (9.8)132 (34.3)0.95 (0.45, 2.02)0.86 (0.41, 1.80)0.69
 Female227 (89.7)26 (10.3)253 (65.7)100100
Age (years)
 6–10 66 (90.4)7 (9.6)73 (19.0)0.93 (0.36, 2.32)0.63 (0.18, 2.20)0.47
 11–15280 (89.7)32 (10.3)312 (81.0)100100
Resident
 Rural86 (88.7)11 (11.3)97 (25.2)1001000.53
 Urban260 (90.3)28 (9.7)288 (74.8)0.84 (0.38, 1.89)0.78 (0.37, 1.66)
Grade
 One–four118 (92.2)10 (7.8)128 (33.2)0.67 (0.29, 1.49)2.02 (0.67, 6.10)0.22
 Five–eight228 (88.7)29 (11.3)257 (66.8)100100
Mothers/guardian edu. status
 Illiterate131 (91.0)13 (9.0)144 (37.4)0.50 (0.20, 1.26)0.43 (0.13, 1.21)0.36
 Read and write/1ry154 (91.7)14 (8.3)168 (43.6)0.46 (0.19, 1.14)0.37 (0.11, 1.09)
 2ry school and above61 (83.6)12 (16.4)73 (19.0)100100
Swimming in river
 Yes106 (79.7)27 (20.3)133 (34.5)5.09 (2.37, 11.1)5.12 (3.47, 17.89)0.01
 No 240 (95.2)12 (4.8)252 (65.5)100100
Swimming frequency/wk
 070 (79.5)18 (20.5)88 (22.9)1.001.000.00
 1-2170 (90.9)17 (9.1)187 (48.6)2.57 (1.18, 5.60)1.82 (0.79, 4.23)
  ≥3106 (96.4)4 (3.6)110 (28.5)6.81 (2.05, 24.95)4.83 (1.37, 18.81)
Washing clothes in river
 Yes101 (79.5)26 (20.5)127 (33.0)4.85 (2.28, 10.43)5.54 (2.89, 13.76)0.00
 No245 (95.0)13 (5.0)258 (67.0)100100
Washing utensil in river
 Yes68 (78.2)19 (21.8)87 (22.6)3.88 (1.86, 8.09)4.91 (2.43, 12.37)0.00
 No278 (93.3)20 (6.7)298 (77.4)100100
Crossing river with bare foot
 Yes75 (77.3)22 (22.7)97 (25.2)4.62 (2.25, 9.77)3.95 (2.13, 7.61)0.00
 No271 (94.1)17 (5.9)288 (74.8)100100
Fishing in the river
 Yes110 (82.1)24 (17.9)134 (34.8)3.20 (1.56, 6.62)3.04 (2.14, 8.71)0.00
 No 235 (93.6)16 (6.4)251 (65.2)100100

Total 346 (89.9)39 (10.1)385 (100)

The difference was statistically significant .