Accuracy and impact of spatial aids based upon satellite enumeration to improve indoor residual spraying spatial coverage

Table 3 Factors associated with household being sprayed as verbally reported during interview

Covariate	Factor	Unadjusted OR (95% CI)	P value	Adjusted OR (95% CI)	P value
District	Kasama	Reference	Reference	Reference	Reference
	Nchelenge^{a, b}	1.820 (1.140–2.906)	0.013	1.755 (1.072–2.873)	0.026
	Samfya^a	1.539 (0.882–2.688)	0.128	1.479 (0.847–2.581)	0.166
Size of structure	Average	Reference	Reference	Reference	Reference
	Larger than average	0.758 (0.533–1.077)	0.121	0.991 (0.686–1.432)	0.962
	Smaller than average	0.692 (0.468–1.024)	0.065	0.723 (0.493–1.060)	0.096
Type of roof	Thatch	Reference	Reference	Reference	Reference
Type of roof	Corrugated metal	0.690 (0.495–0.962)	0.029	0.993 (0.658–1.498)	0.972
Type of wall	Rough	Reference	Reference	Reference	Reference
Type of wall	Smooth	0.657 (0.439–0.983)	0.041	0.693 (0.431–1.116)	0.130

Kasama, Nchelenge and Samfya all received different levels of spatial aid during IRS implementation, with Kasama having enumeration only; Samfya having paper-based maps developed from satellite imagery; and Nchelenge having the same type of paper-based maps as Samfya with the addition of in-field usage of the mSpray mobile application during spray implementation. Spatial aid indicated by ^a representing use of paper-based maps during implementation or by ^b representing mSpray field implementation
N = 2679 structures; 87 transects

ISSN: 1475-2875