Table 3.

Effect of the interventions on incidence of clinical episodes of falciparum and vivax malaria

		Plasmodium falciparum			Plasmodium vivax
		IRR	95%CI	p value	IRR	95%CI	p value
Type of village
	No MDA (non-hotspot or unknown)	1	Ref		1	Ref
	Hotspot before MDA*	2·69	1·80–4·04	<0·0001	1·87	1·32–2·67	<0·0001
	Hotspot after MDA*	0·50	0·31–0·80	<0·0001	0·48	0·32–0·73	<0·0001
Duration of malaria post activity in the village, by type of village (linear approximation, per quarter increment)
	No MDA (non-hotspot or unknown)	0·75	0·73–0·78	<0·0001	0·93	0·91–0·94	<0·0001
	Hotspot before MDA	0·82	0·76–0·88	<0·0001	0·93	0·87–0·98	<0·0001
	Hotspot after MDA	0·99	0·92–1·06	<0·0001	1·05	1·00–1·11	<0·0001
Number of MDA done within the village tract excluding the village (per village increment)		0·96	0·92–1·00	0·0471	0·98	0·95–1·01	0·2538
Coverage of villages within the village tract (+10%)		0·90	0·87–0·93	<0·0001	0·92	0·90–0·95	<0·0001
Malaria post embedded in a community clinic		1·75	1·15–2·66	0·0087	1·44	1·04–2·00	0·0293

Data presented by the regional elimination programme. Incidence rate ratios (IRR) show the relative contribution of mass drug administration (MDA), community-based malaria posts, and coverage to the decrease in village-level and incidence after adjustment for seasonality, geographical location, and other interventions in a multivariable analysis. p values correspond to the inclusion of the three-category variable.

^*Using the category hotspot before MDA as the reference, this translates to IRR 0·19 (0·13–0·26) for the hotspot after MDA.