Table 3. Risk at water contact points for S. mansoni infection.
| Jenipapo (n = 461) | Volta do Rio (n = 352) | |||||||
| Infected (%) | Not-Infected | OR (95% CI) | p-value | Infected (%) | Not-Infected | OR (95% CI) | p-value | |
| Contact point | n = 211 | n = 250 | n = 124 | n = 230 | ||||
| 1 | 45 (21.3) | 27 (10.8) | 1.42 (0.77–2.62) | 0.292 | 52 (41.9) | 21 (9.1) | 2.97 (1.44–6.11) | 0.001 |
| 2 | 69 (32.7) | 50 (20.0) | 1.39 (0.83–2.30) | 0.182 | 48 (38.7) | 33 (14.3) | 1.84 (0.97–3.49) | 0.075 |
| 3 | 31 (14.7) | 14 (5.6) | * | 41 (33.1) | 12 (5.2) | 3.60 (1.49–8.72) | 0.004 | |
| 4 | 184 (87.2) | 215 (86.0) | * | 76 (61.3) | 126 (54.8) | * | ||
| 5 | 110 (52.1) | 74 (29.6) | 2.27 (1.52–3.39) | <0.001 | 15 (12.1) | 10 (4.3) | * | |
| 6 | 49 (23.2) | 37 (14.8) | * | 17 (13.7) | 9 (3.9) | * | ||
| 7 | 11 (5.2) | 9 (3.6) | * | 37 (29.8) | 55 (23.9) | * | ||
| 8 | - | - | - | 8 (6.5) | 9 (3.9) | * | ||
| Other | 16 (7.6) | 13 (5.2) | * | 18 (14.5) | 17 (7.4) | 2.05 (0.90–4.66) | 0.091 | |
Reported use of a water contact point (see Figure 1) was entered into a logistic regression model where the dependent variable was S. mansoni infection status. The model was controlled for age and sex.
* Indicates contact points that did not enter the model. Statistically significant comparisons are in bold type.