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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