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Table 3 Risk factor analysis for malaria infection: uni- and multivariate adjusted analysis using survey logistic regression (n = 429)

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

Risk factors

Parasite prevalence

Cases

Unadjusted

Adjusted

 

(%)

n

N

OR (95%CI)

 

Total

14.2

429

3,023

  

Gender:

     

- Male

16.0

225

1,409

1.00

1.00

- Female

12.6

204

1,614

0.76 (0.59–0.99)

0.75° (0.57–0.98)

Age (y):

     

- < 16

17.9

121

677

1.00

1.00

- 16–45

13.7

270

1,976

0.73° (0.59–0.90)

0.65° (0.52–0.81)

- > 45

10.3

38

370

0.53° (0.36–0.76)

0.47° (0.31–0.73)

Ethnic group:

     

- Ra-glai

15.1

409

2,708

1.00

1.00

- Others

6.3

20

315

0.39 (0.14–1.10)

0.47 (0.16–1.35)

Education:

     

- No

16.4

165

1,007

1.00

1.00

- Primary

14.2

250

1,760

0.84 (0.55–1.31)

0.85 (0.55–1.33)

- Secondary or more

5.5

14

255

0.30° (0.20–0.44)

0.42° (0.27–0.64)

Wealth:

     

- Low

17.1

305

1,783

1.00

1.00

- Medium

13.6

40

295

0.76 (0.30–1.92)

0.87 (0.36–2.10)

- High

8.9

84

945

0.43° (0.32–0.71)

0.51° (0.35–0.75)

Forest activities last month:

     

- No work & no sleep in forest

12.5

50

401

1.00

1.00

- Work +/- sleep occasionally

14.1

358

2544

1.15 (0.67–1.96)

1.19 (0.73–1.92)

- Work & sleep regularly

26.9

21

78

2.59° (1.29–5.19)

2.70° (1.40–5.21)

Bed net use:

     

- No

28.5

39

137

1.00

1.00

- Untreated bed net

23.3

49

210

0.76 (0.42–1.38)

0.82 (0.44–1.53)

- Insecticide-treated bed net

12.7

341

2,674

0.37° (0.17–0.78)

0.46° (0.23–0.90)

  1. °p < 0.05