Table 1.
Baseline characteristics of the study population
| Study population, N = 9,875 | n | % |
| Sex (ratio = 0.98) | ||
| - Male | 4,900 | 49.62 |
| Age groups: | ||
| - ≤ 9 years | 2,684 | 27.18 |
| - 10–19 years | 2,379 | 24.09 |
| - 20–29 years | 1,733 | 17.55 |
| - 30–39 years | 1,110 | 11.24 |
| - 40–49 years | 954 | 9.66 |
| - = 50 years | 1,015 | 10.28 |
| Ethnic groups: | ||
| - Ra-glai | 8,205 | 83.09 |
| - K'ho | 1,339 | 13.56 |
| - Kinh | 314 | 3.18 |
| - Others (Chu, Cham, Ede) | 17 | 0.17 |
| Education level (age ≥ 20, n = 4,812): | ||
| - None | 2,197 | 45.66 |
| - Primary school | 2,258 | 46.92 |
| - Secondary school or higher | 341 | 7.09 |
| - Missing | 16 | 0.33 |
| Occupation: | ||
| - None (children, students, retired people) | 4,376 | 44.31 |
| - Forest work (farming & other) | 5,242 | 53.08 |
| - Other (teacher, health staff.) | 240 | 2.43 |
| - Missing | 17 | 0.17 |
| Bed net use in the village: | ||
| - Sleep under ITN | 8,707 | 88.17 |
| - Sleep under an untreated bed net | 494 | 5 |
| - Sleep without bed net | 656 | 6.64 |
| - Missing | 18 | 0.18 |
| Forest activities: | ||
| - Never | 4,176 | 42.29 |
| - Only during day | 3,244 | 32.85 |
| - Work and sleep in the forest | 2,438 | 24.69 |
| - Missing | 17 | 0.17 |
| Days/month spent in forest, median [range] (n = 5,682) | 23 [1;30] | |
| Nights/month spent in forest, median [range] (n = 2,438) | 16 [1;30] | |
| Bednet/hammock use in the forest (n = 2,438): | ||
| - Sleep under ITN | 1,717 | 70.43 |
| - Sleep in a hammock | 319 | 13 |
| - Sleep under ITN and hammock | 80 | 3.28 |
| - Sleep without bed-net and hammock | 322 | 13.21 |
| Households N = 1,867 | ||
| House structure: | ||
| - Thatched bamboo | 951 | 50.94 |
| - Wooden boards | 374 | 20.03 |
| - Dried mud | 260 | 13.93 |
| - Bricks | 282 | 15.1 |
| Socio economic level: | ||
| - No radio, TV, motorbike | 857 | 45.9 |
| - Only a radio | 517 | 27.69 |
| - Only TV | 99 | 5.3 |
| - TV + radio (no moto) | 94 | 5.03 |
| - At least a motorbike (+/-radio, TV) | 300 | 16.07 |