Table 3.
Environmental household risk factors comparing negative and positive secondary households enrolled January 2015–July 2017
| Secondary household type | Negative | Positive | p-value† |
|---|---|---|---|
| N | 485a | 45 | |
| ESD radius | 0.56 | ||
| ≤ 140 m | 194 (40.0%) | 16 (35.6%) | |
| 140–250 m | 291 (60.0%) | 29 (64.4%) | |
| Distance to index household in metres, median (IQR) | 164.7 (104.1, 210.1) | 179.8 (121.7, 226.9) | 0.17 |
| Elevation difference with index household in metres, median (IQR) | 0.0 (− 9.3, 11.0) | − 0.7 (− 8.9, 9.4) | 0.52 |
| Distance first-order stream in metres, median (IQR) | 691.0 (339.6, 1033.0) | 485.9 (307.5, 833.1) | 0.081 |
| Distance second-order stream in metres, median (IQR) | 2008.8 (1029.5, 3498.0) | 1578.8 (1029.3, 2873.5) | 0.21 |
| Distance third-order stream in metres, median (IQR) | 3368.5 (1541.0, 5950.5) | 3391.8 (1494.9, 5350.4) | 0.63 |
| Distance fourth-order stream in metres, median (IQR) | 5363.7 (2233.4, 9001.8) | 6043.9 (2503.6, 9395.2) | 0.63 |
| Distance fifth-order stream in metres, median (IQR) | 5291.9 (1651.4, 8297.5) | 5382.0 (1405.2, 10061.5) | 0.95 |
| Distance sixth-order stream in metres, median (IQR) | 35003.7 (30907.1, 41962.9) | 34138.1 (27043.0, 41075.6) | 0.59 |
| Distance Nearest Stream in metres, median (IQR) | 533.2 (275.1, 795.5) | 335.3 (242.2, 539.1) | 0.006 |
| Nearest stream order in metres | 0.21 | ||
| First | 322 (66.4%) | 25 (55.6%) | |
| Second | 50 (10.3%) | 3 (6.7%) | |
| Third | 37 (7.6%) | 7 (15.6%) | |
| Fourth | 21 (4.3%) | 2 (4.4%) | |
| Fifth | 55 (11.3%) | 8 (17.8%) | |
| Distance main road in metres, median (IQR) | 8457.1 (3121.1, 13666.0) | 9266.6 (4130.4, 17353.7) | 0.28 |
| Distance nearest animal pen in metres, median (IQR) | 38.6 (25.7, 59.4) | 36.9 (20.6, 50.5) | 0.43 |
| Number of animal pens within 100 m, median (IQR) | 1.0 (0.0, 2.0) | 1.0 (0.0, 1.0) | 0.92 |
| Animal pen | 0.69 | ||
| No | 187 (38.6%) | 16 (35.6%) | |
| Yes | 298 (61.4%) | 29 (64.4%) |
†Chi square test for proportions and Wilcoxon rank-sum for means
aOne household outside 250-m radius of index household excluded