Table 1

Baseline characteristics of the study population
Study population, N = 18,646
 n
 %
Sex (ratio = 0.98)

     - Male
 9,230
 49.5
Age groups:

     - < 10 y
 5,026
 27.0
     - 10–19 y
 4,619
 24.8
     - 20–39 y
 5,351
 28.7
     - 40–59 y
 2,768
 14.9
     - > 59 y
 882
 4.7
Ethnic groups:

     - Ra-glai
 16,438
 88.2
     - K'ho
 1,728
 9.3
     - Kinh
 454
 2.4
     - Others (Chu, Cham, Ede)
 26
 0.1
Education level (age ≥ 20, n = 9,001):

     - None
 4,230
 47.1
     - Primary school
 4,101
 45.6
     - Secondary school or higher
 654
 7.3
     - Missing
 16
 0.2
Occupation:

     - None (children, students, retired people)
 8,229
 44.1
     - Forest work (farming & other)
 9,868
 52.9
     - Other (teacher, health staff...)
 532
 2.9
     - Missing
 17
 0.1
Bed net use in the village:

     - Sleep under ITN
 16,088
 86.3
     - Sleep under an untreated bed net
 1,310
 7.0
     - Sleep without bed net
 1,230
 6.6
     - Missing
 18
 0.1
Forest activities:

     - Never
 7,864
 42.2
     - Only during day
 6,425
 34.5
     - Work and sleep in the forest
 4,340
 23.3
     - Missing
 17
 0.1
Days/month spent in forest, median [range] (n = 10,728)
 24 [1;30]
Nights/month spent in forest, median [range] (n = 4,340)
 15 [1;30]
Bednet/hammock use in the forest (n = 4,340):

     - Sleep under ITN
 2,498
 57.6
     - Sleep in a hammock
 549
 12.6
     - Sleep under ITN and hammock
 635
 14.6
     - Sleep without bed-net and hammock
 658
 15.2
Households N = 3,652
n
 %
House structure:

     - Thatched bamboo
 1,594
 43.7
     - Wooden boards
 1,006
 27.6
     - Dried mud
 496
 13.6
     - Bricks
 556
 15.2
Socio economic level:

     - No radio, TV, motorbike
 1,437
 39.4
     - Only a radio
 1,160
 31.8
     - Only TV
 204
 5.6
     - TV + radio (no moto)
 268
 7.3
     - At least a motorbike (+/-radio, TV)
 583
 16.0

Thang et al. Malaria Journal 2008 7:28   doi:10.1186/1475-2875-7-28

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