Table 3.

Malaria incidence by ITN use and net hole size in a fixed cohort of 1223 children, Liwonde, Malawi April–December 2013

ITN use and hole category	Malaria infections, n	PYs at risk	Adjusted iPPY (95% CI)
Use of ITN with no holes	393	345	0.75 (0.55–1.02)
Use of ITN with ≥ 1 small or medium hole (no large or extra-large holes)	208	122	0.98 (0.70–1.37)
Use of ITN with ≥ 1 large or extra-large hole	168	126	0.86 (0.61–1.21)
No ITN use	25	19	0.99 (0.59–1.66)

ITN insecticide-treated bed net, iPPY infections per person-year; Large hole between fist and head-sized, Extra-large hole head-sized or larger

* Adjusted for age, inverse distance-weighted malaria prevalence, malaria season, number of ITNs < 300 m, altitude, household wealth index, and caregiver completion of primary school