Malaria incidence per person-year (95% CI) [cases/person-years] | Rate ratio (95% CI) | Rate ratio excluding outliersa (95% CI) | |
---|---|---|---|
January–July 2013 | |||
Overall incidence | 0.12 (0.06–0.22) [124/1057] | – | – |
Lower resistance (mortality equal to or above median value of 95.3%) | 0.05 (0.02–0.13) [28/530] | 1 | 1 |
Higher resistance (mortality below median value of 95.3%) | 0.18 (0.09–0.39) [96/527] | 3.45 (1.17–10.20) p = 0.027 | 2.48 (0.88–7.00) p = 0.082 |
Effect per 10% reduction in bioassay mortality | – | 1.46 (0.84–2.54) p = 0.170 | 1.11 (0.68–1.82) p = 0.667 |
August–December 2013 | |||
Overall incidence | 0.31 (0.19–0.49) [240/778] | – | – |
Lower resistance (mortality equal to or above median value of 93.9%) | 0.42 (0.22–0.80) [158/373] | 1 | 1 |
Higher resistance (mortality below median value of 93.9%) | 0.20 (0.11–0.39) [82/405] | 0.48 (0.21–1.11) p = 0.083 | 0.60 (0.26–1.37) p = 0.214 |
Effect per 10% reduction in bioassay mortality | – | 0.45 (0.16–1.33) p = 0.143 | 0.46 (0.14–1.58) p = 0.208 |
January–December 2014 | |||
Overall incidence | 0.23 (0.13–0.41) [420/1804] | – | – |
Lower resistance (mortality equal to or above median value of 47.2%) | 0.09 (0.04–0.25) [86/907] | 1 | 1 |
Higher resistance (mortality below median value of 47.2%) | 0.37 (0.20–0.70) [334/897] | 3.93 (1.34–11.51) p = 0.015 | 2.46 (0.89–6.78) p = 0.080 |
Effect per 10% reduction in bioassay mortality | – | 1.61 (1.21–2.13) p = 0.002 | 1.28 (0.91–1.79) p = 0.144 |
January 2013–December 2014 (all time periods combined) | |||
Overall incidence | 0.22 (0.14–0.34) [784/3639] | – | – |
Lower resistance (mortality equal to or above median value of 47.2%) | 0.20 (0.13–0.31) [270/1378] | 1 | 1 |
Higher resistance (mortality below median value of 91.3%) | 0.23 (0.13–0.40) [514/2261] | 1.11 (0.52–2.35) p = 0.777 | 0.89 (0.42–1.86) p = 0.738 |
Effect per 10% reduction in bioassay mortality | – | 1.50 (1.14–1.97) p = 0.005 | 1.17 (0.90–1.53) p = 0.239 |