Risk factors | Cases (n = 81) | Controls (n = 94) | cOR (95% CI) | aOR (95% CI) |
---|---|---|---|---|
Seasonal exposure | ||||
 Number of nights slept in the forest per year (mean-SD) | 130.8 ± 80.8 | 118.5 ± 70.4 | 1.00 (1.00–1.01) | 1.00 (0.99–1.00) |
 Go to the forest during high risk months (October–November and December) | 60 (45.5%) | 72 (54.5%) | 0.87 (0.44–1.74) | 0.76 (0.36–1.60) |
Sleeping habits (in hammock-bed or floor) | ||||
 Sleep without any kind of net*# | 1 (50%) | 1 (50%) |  |  |
 Use treated nets* | 7 (24.1%) | 22 (75.9%) | 0.31 (0.12–0.77) | 0.31 (0.12–0.80) |
 Use untreated nets* | 78 (47.3%) | 87 (52.7%) | 2.09 (0.52–8.37) | 1.89 (0.44–8.09) |
 Use net (treated or untreated) for the whole night | ||||
  Never or sometimes | 13 (54.2%) | 11 (45.8%) | (ref) | (ref) |
  Usually or always | 68 (45%) | 83 (55%) | 0.69 (0.29–1.65) | 0.62 (0.24–1.63) |
Slept in a hut without walls# | 15 (79%) | 4 (21%) | Â | Â |
Sleep in hammock with an untreated net* | 33 (43.4%) | 43 (56.6%) | 0.82 (0.45–1.49) | 0.94 (0.48–1.84) |
After dark activities | ||||
 Collecting water after dark | 57 (52.8%) | 51 (47.2%) | 2.00 (1.07–3.75) | 1.99 (1.02–3.90) |
 Bathing in the stream after dark | 72 (50.4%) | 71 (49.6%) | 2.59 (1.12–5.99) | 2.44 (1.02–5.88) |
 Work after dark | 26 (65%) | 14 (35%) | 2.70 (1.30–5.63) | 2.93 (1.35–6.34) |