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Table 4 Multivariate analysis of the prevalence rates of Plasmodium falciparum asymptomatic infection determined by cross-sectional survey

From: Inland valley rice production systems and malaria infection and disease in the forest region of western Côte d’Ivoire

  N Positive thick blood smear Prevalence rate (95% CI) Unadjusted odds-ratio (95% CI) p-values Adjusted odds-ratio (95% CI) p-values
Agro-ecosystem 0.358   0.081
R0 8,189 3,940 48.1 (44.8–51.4) 1.00   1.00  
R1 11,020 4,952 44.9 (41.7–48.2) 0.88 (0.73–1.06) 0.166 0.79 (0.64–0.97) 0.025
R2 10,121 4,772 47.1 (45.6–48.7) 0.96 (0.83–1.11) 0.583 0.85 (0.73–1.00) 0.053
Age group (years) <0.0001   <0.0001
0–1 1,165 890 76.4 (73.5–79.3) 1.00   1  
2–4 3,068 2,375 77.4 (75.5–79.3) 1.06 (0.88–1.27) 0.525 1.06 (0.88–1.27) 0.518
5–9 5,268 3,345 63.5 (61.6–65.4) 0.54 (0.45–0.65) <0.0001 0.54 (0.45–0.65) <0.0001
10–19 5,773 2,662 46.1 (43.7–48.6) 0.26 (0.22–0.32) <0.0001 0.26 (0.22–0.32) <0.0001
20–39 7,608 2,486 32.7 (30.6–34.7) 0.15 (0.12–0.18) <0.0001 0.15 (0.12–0.18) <0.0001
> = 40 6,448 1,906 29.6 (27.5–31.6) 0.13 (0.11–0.16) <0.0001 0.13 (0.10–0.16) <0.0001
Season 0.741   0.705
Dry 10,537 4,883 46.3 (44.9–48.4) 1.00   1.00  
Wet 18,793 8,781 46.7 (44.7–48.8) 1.01 (0.92–1.11) 0.741 1.02 (0.92–1.13) 0.705