Incremental impact on malaria incidence following indoor residual spraying in a highly endemic area with high standard ITN access in Mozambique: results from a cluster‐randomized study

Table 2 Incidence per 10,000 children-months. Time at risk corrected by ten days after each ACT treatment

Study	No IRS			IRS			Crude IRR	(95% Conf. Interval)
Month	RDT +	Cohort months at risk	Cumulative cases	RDT +	Cohort months at risk	Cumulative cases	Crude IRR	(95% Conf. Interval)
1	398		398	380		380
2	374	600	772	422	705	802	0.96	(0.83, 1.11)
3	406	812	1178	353	767	1155	0.92	(0.80, 1.06)
4	345	644	1523	234	602	1389	0.73	(0.61, 0.86)
5	393	759	1916	331	762	1720	0.84	(0.72, 0.97)
6	355	678	2271	282	657	2002	0.82	(0.70, 0.96)
7	301	653	2572	282	692	2284	0.88	(0.75, 1.04)
8	227	663	2799	199	700	2483	0.83	(0.68, 1.01)
9	207	590	3006	163	628	2646	0.74	(0.60, 0.91)
10	209	724	3215	167	721	2813	0.80	(0.65, 0.99)
11	146	725	3361	137	747	2950	0.91	(0.72, 1.16)
12	154	698	3515	88	681	3038	0.59	(0.45, 0.77)
13	242	678	3757	172	693	3210	0.70	(0.57, 0.85)
14	233	619	3990	162	644	3372	0.67	(0.54, 0.82)
15	239	612	4229	204	633	3576	0.83	(0.68, 1.00)
16	326	688	4555	258	666	3834	0.82	(0.69, 0.96)
17	319	672	4874	265	675	4099	0.83	(0.70, 0.98)
18	260	632	5134	242	640	4341	0.92	(0.77, 1.10)
19	225	654	5359	160	653	4501	0.71	(0.58, 0.88)
20	187	655	5546	118	651	4619	0.63	(0.50, 0.80)
21	197	610	5743	170	574	4789	0.92	(0.74, 1.13)
22	15	37	5758	12	101	4801	0.30	(0.13, 0.68)

IRSindoor residual spraying, RDT rapid diagnostic test, IRR incidence rate ratio

ISSN: 1475-2875