Skip to main content

Table 1 Baseline characteristics of the study population

From: Malaria in central Vietnam: analysis of risk factors by multivariate analysis and classification tree models

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