Risk Factors S.mansoni Crude OR (CI) (P-value)   Adjusted OR (CI) (P-value) Total No Total+ve Sex Male Female 227 243 114 85 1.863(1.286-2.699)* 1.00 1.721(1.121-2.641)* 1.00 Age group (yrs) 5-9 10-14 15 -19 96 303 70 17 149 33 .241(.199-.488 )** 1.085(.645-1.826) 1.00 .334(.151-.741)* 1.385(.756-2.539) 1.00 Fever Yes No 50 33 17 2.958(1.596-5.483)* 1.00 1.677(.818-3.440) 1.00 Blood in stool Yes No 103 85 18 10.438(5.995-18.173)** 1.00 8.423(4.602-15.416)** 1.00 Bloodydiarrhea Yes No 38 26 12 3.230(1.587-6.575)* 1.00 1.744(.760-4.001) 1.00 Abdominal pain Yes No 152 88 64 2.552(1.711-3.792)** 1.00 1.213(.733-2.007) 1.00

Table 4: Univariate and multivariate logistic regression analysis for factors potentially associated with Schistosoma mansoni infection among school children around Hizaty Wedicheber microdam in Merbmieti, Tigray, Ethiopia. OR: odd ratio, CI: 95% confidence interval, *p<0.05,**p<0.001, No:number, +ve: positive