Table 1 Prevalence and risk factors of Schistosoma mansoni among residence of fishing villages of north-western Tanzania
Variable | No. infected | Prevalence ofS. mansoni(95% CI) | Crude prevalence ratio (95% CI) | Adjusted prevalence ratio (95% CI) |
|---|---|---|---|---|
Overall | 854 | 47.84 (40.41 – 56.60) | ----- | ----- |
Sex | ||||
Female | 382 | 40.29 (32.43 – 50.00) | 1 | 1 |
Male | 472 | 56.14 (49.19 – 64.06)* | 1.39 (1.26 – 1.54)** | 1.27 (1.14 – 1.42)*** |
Age (in years) | ||||
21 – 30 | 365 | 53.18 (47.48 – 59.55)* | 1.22 (1.99 – 1.48) | 1.19 (0.98 – 1.45) |
31 – 40 | 292 | 47.66 (38.38 – 59.19) | 1.09 (0.99 – 1.19) | 1.12 (0.92 – 1.37) |
41 – 50 | 125 | 38.96 (29.80 – 50.93) | 0.89 (0.76 – 1.04) | 0.91 (0.72 – 1.13) |
51 – 55 | 72 | 43.71 (35.49 – 53.83) | 1 | 1 |
Marital status | ||||
Married | 591 | 47.20 (36.04 – 61.83) | 1 | 1 |
Single | 263 | 48.63 (29.60 – 79.87) | 1.03 (0.82 – 1.29) | 1.05 (0.95 – 1.16) |
Education level | ||||
Literate | 564 | 49.04 (43.27 – 55.59) | 1 | 1 |
Illiterate | 290 | 45.44 (34.83 – 59.28) | 0.93 (0.91 – 0.94) | 0.98 (0.88 – 1.08) |
Occupation | ||||
SME | 129 | 44.14 (36.14 – 53.91) | 1 | 1 |
Peasants | 561 | 45.11 (37.98 – 53.58 | 1.02 (0.89 – 1.16) | 1.06 (0.86 – 1.24) |
Fishing | 164 | 66.28 (55.77 – 78.78)* | 1.52 (1.42 – 1.59)** | 1.27 (1.06 – 1.53)*** |
Village of residences | ||||
Igombe | 176 | 40.42 (29.82 – 54.78) | 1 | 1 |
Igalagala | 141 | 55.47 (39.08 – 78.72)* | 1.37 (1.31 – 1.44)** | 1.31 (1.12 – 1.52)*** |
Kayenze | 351 | 54.21 (42.96 – 68.38)* | 1.34 (1.25 – 1.44)** | 1.32 (1.15 – 1.51)*** |
Sangabuye | 186 | 41.24 (26.34 – 64.58) | 1.02 (0.88 – 1.78) | 1.06 (0.89 – 1.25) |
Duration of residences (in years) | ||||
3 – 5 | 152 | 50.16 (43.42 – 57.94) | 1 | 1 |
6 – 10 | 169 | 50.21 (38.90 – 64.79) | 1.01 (0.80 – 1.25) | 1.01 (0.86 – 1.18) |
11 – 20 | 187 | 49.76 (38.92 – 63.61) | 0.98 (0.85 – 1.16) | 1.01 (0.88 – 1.16) |
≥21 | 346 | 48.69 (43.06 – 55.06) | 0.97 (0.92 – 0.99) | 0.96 (0.85 – 1.09) |
CD4 + cell counts/ÎĽL | ||||
<350 | 28 | 38.36 (28.63 – 51.38) | 1 | ----- |
≥350 | 22 | 44.89 (28.96 – 69.61) | 1.17 (0.91 – 1.51) | ----- |
HIV-1 sero-status | ||||
Negative | 804 | 48.12 (41.04 – 56.43) | 1 | 1 |
Positive | 50 | 39.52 (27.64 – 56.49) | 0.92 (0.78 – 1.09) | 1.01 (0.84 – 1.21) |