Table 1.
Characteristics of Children in Cohort From January 1, 2014 to June 30, 2017
| Characteristic | All Years | Pre-IRS | Post-IRS | P Valuea |
|---|---|---|---|---|
| Person-years of observation | 801.5 | 546.8 | 254.8 | |
| Number of participating children | 319 | 274 | 286 | |
| Proportion female | 46.3 | 43.8 | 47.0 | .59 |
| Mean age at episode (SD) | 5.2 (2.6) | 5.0 (2.5) | 6.3 (2.5) | <.0001 |
| Total number of incident episodes of malaria | 1166 | 828 | 338 | |
| Median episodes per person year (IQR) | 1.5 (2.1) | 2.1 (3.97) | 0.40 (0.96) | <.0001 |
| Mean hemoglobin (SD; g/dL) | 11.7 (0.9) | 11.2 (1.1) | 12.1 (0.8) | <.0001 |
Abbreviations: IRS, indoor residual spraying; IQR, interquartile range; SD, standard deviation;
a P value is for the difference between pre-IRS and post-IRS values.