Incremental cost and cost-effectiveness of the addition of indoor residual spraying with pirimiphos-methyl in sub-Saharan Africa versus standard malaria control: results of data collection and analysis in the Next Generation Indoor Residual Sprays (NgenIRS) project, an economic-evaluation

Table 3 Effectiveness estimates from the NgenIRS project

Programme	Years(s)	Incidence rate ratio estimate	Lower 95% CI	Upper 95% CI	Estimated cases averted	Estimated persons targeted^a
Ghana AIRS/VectorLink Northeastern and Northern Regions	2015–2017	0.60	0.36	1.00	257,162	597,895
Mali AIRS/VectorLink Ségou Region	2015–2016	0.68	0.52	0.89	349,688	304,654
Uganda Abt bilateral Northern and Eastern Regions	2016	0.53	0.43	0.66	245,331	1.78 million
Zambia AIRS/VectorLink Eastern, Luapula, Muchinga, Northern Provinces	2017	0.88	0.82	0.95	N/A^b	N/A

Effectiveness results were produced by separate efforts
AIRS, Africa Indoor Residual Spraying Project; CI, confidence interval; N/A, not applicable
^aThe total population of districts that received an IRS intervention during the analysis timeframe
^bTo calculate cases averted by 3GIRS, it was assumed that baseline incidence aligned with the World Malaria Report 2018

ISSN: 1475-2875