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Table 1 Rates of clinical malaria from routine health facility data

From: Implications of insecticide resistance for malaria vector control with long-lasting insecticidal nets: evidence from health facility data from Benin

 

Under 5 years of age

5 years of age or over

Malaria incidence per person-year (95% CI) [cases/person-years]

Rate ratio (95% CI)

Malaria incidence per person-year (95% CI) [cases/person-years]

Rate ratio (95% CI)

January–July 2013

Overall

0.20 (0.15–0.26) [1545/7832]

0.023 (0.016–0.034) [1015/43,510]

Lower resistance (mortality equal to or above median value of 95.3%)

0.18 (0.11–0.30) [635/3443]

1

0.016 (0.010–0.028) [311/19,126]

1

Higher resistance (mortality below median value of 95.3%)

0.21 (0.14–0.31) [910/4389]

1.12 (0.63–2.02)

p = 0.684

0.029 (0.017–0.049) [704/24,385]

1.77 (0.88–3.56)

p = 0.102

Effect per 10% reduction in bioassay mortality

1.02 (0.80–1.29)

p = 0.863

1.06 (0.85–1.32)

p = 0.605

August–December 2013

Overall

0.30 (0.21–0.42) [1563/5211]

0.030 (0.019–0.049) [879/28,948]

Lower resistance (mortality equal to or above median value of 93.9%)

0.26 (0.19–0.35) [728/2798]

1

0.024 (0.017–0.033) [370/15,545]

1

Higher resistance (mortality below median value of 93.9%)

0.35 (0.19–0.64) [835/2413]

1.33 (0.70–2.52)

p = 0.368

0.038 (0.017–0.087) [509/13,403]

1.60 (0.69–3.68)

p = 0.261

Effect per 10% reduction in bioassay mortality

0.94 (0.50–1.77)

p = 0.854

0.89 (0.43–1.81)

p = 0.731

January–December 2013 (both time periods combined)

Overall

0.24 (0.18–0.32) [3108/13,044]

0.026 (0.017–0.039) [1894/72,458]

Lower resistance (mortality equal to or above median value of 93.9%)

0.21 (0.16–0.28) [1376/6472]

1

0.019 (0.014–0.026) [693/35,952]

1

Higher resistance (mortality below median value of 94.8%)

0.26 (0.17–0.41) [1732/6572]

1.27 (0.81–2.00) p = 0.276

0.033 (0.018–0.060) [1201/36,506]

1.74 (0.91–3.34) p = 0.093

Effect per 10% reduction in bioassay mortality

1.01 (0.82–1.25) p = 0.915

1.04 (0.86–1.26) p = 0.677