Table 2.
Characteristics of index cases and neighbors sleeping in the forest and farm in Phu Yen province, Vietnam, 2016
| Characteristics | Category | Index Case | Neighbor | Total | POR (95% CI) |
|---|---|---|---|---|---|
| Sleeping in the forest | n = 54 (n, %) | n = 39 (n, %) | n = 93 (n, %) | ||
|
Bed or hammock net use *more than one answer possible |
- Do not use bed-nets or hammock nets -Use untreated nets Adjusted for education level -Use treated bed-nets Adjusted for education level |
35 (64.8) 20 (37.0) 2 (3.7) |
15 (38.5) 24 (61.5) 7 (17.9) |
50 (53.8) 44 (47.3) 9 (9.7) |
2.95 (1.26, 6.92) 0.37 (0.16, 0.86) 0.42 (0.17, 1.00)a 0.18 (0.03, 0.90) 0.10 (0.02, 0.58)a |
| Forest trips per year |
> 5 trips 5 trips or less |
31 (57.4) 23 (42.6) |
6 (15.4) 33 (84.6) |
37 (39.8) 56 (60.2) |
7.41 (2.66, 20.63) |
| Nights per trip in the forest |
7 nights or less > 7 nights |
27 (50) 27 (50) |
3 (7.7) 36 (92.3) |
30 (32.3) 63 (67.7) |
12.00 (3.29, 43.72) |
| Type of place for sleeping |
Hut without wall/outdoor Hut with wall |
48 (88.9) 6 (11.1) |
6 (15.4) 33 (84.6) |
54 (58.1) 39 (41.9) |
44.00 (13.05, 148.33) |
| Main work in the forest |
Deep Forest: Aloe hunter, trapper, plantation and timber Forest Fringe: Forest guard, trader, construction worker |
42 (77.8) 12 (22.2) |
9 (23.1) 30 (76.9) |
51 (54.8) 42 (45.2) |
11.67 (4.37, 31.18) |
| Work after dark |
Never Sometimes |
49 (90.7) 5 (9.3) |
25 (64.4) 14 (35.9) |
74 (79.6) 19 (20.4) |
5.48 (1.84, 16.35) |
| Sleeping in the farm | n = 53 | n = 151 | n = 204 | ||
| Bed or hammock net use |
- Do not use bed-nets or hammock nets - Use untreated nets Adjusted for education level - Use treated bed-nets Adjusted for education level |
23 (43.4) 21 (39.6) 13 (24.5) |
67 (44.4) 50 (33.1) 56 (37.1) |
90 (44.1) 71 (34.8) 69 (33.8) |
0.96 (0.51, 1.81) 1.33 (0.69, 2.53) 0.55 (0.27, 1.12) |
| Forest trips per year |
> 5 trips 5 trips or less |
37 (69.8) 16 (30.2) |
87 (57.6) 64 (42.4) |
124 (60.8) 80 (39.2) |
1.70 (0.85, 3.32) |
| Nights per trip in the forest |
7 nights or less > 7 nights |
36 (67.9) 17 (32.1) |
95 (62.9) 56 (37.1) |
131 (64.2) 73 (35.8) |
1.25 (0.87, 2.43) |
| Type of place for sleeping |
Hut without wall/outdoor Hut with wall |
37 (69.8) 16 (30.2) |
88 (53.3) 63 (41.7) |
125 (61.3) 79 (38.7) |
1.66 (0.85, 3.21) |
| Main work in the forest |
Deep Forest: Aloe hunter, trapper, plantation and timber Forest Fringe: Forest guard, trader, construction worker |
15 (28.3) 38 (71.7) |
19 (12.6) 132 (87.4) |
34 (16.7) 170 (83.3) |
2.74 (1.27, 5.91) |
| Work after dark |
Never Sometimes |
26 (49.1) 27 (50.9) |
60 (39.7) 91 (60.3) |
86 (42.2) 118 (57.8) |
1.46 (0.78, 2.73) |
POR prevalence odds ratio, CI confidence interval, aadjusted prevalence odds ratio