Use of remote sensing to identify spatial risk factors for malaria in a region of declining transmission: a cross-sectional and longitudinal community survey

Table 1 Spatial risk factors for malaria

	Number of households	% Positive households	Unadjusted OR (95% CI)	P	Adjusted OR (95% CI)	P
Third order streams
<1.98 km	31	18	2.85 (1.18, 6.9)	0.020	3.93 (1.55, 9.93)	0.0008
1.98-3.74 km	33	16	1.80 (0.76, 4.2)	0.179	3.47 (1.20, 10.05)	0.004
3.74-5.95 km	32	13	1.08 (0.44, 2.7)	0.862	1.38 (0.52, 3.70)	0.194
> 5.95 (ref)	32	13	1.00
Fifth order streams
<4.55 km	32	7	0.39 (0.16, 0.91)	0.030
4.55-11.92 km	32	8	0.22 (0.09, 0.58)	0.002
11.92-20.57 km	32	17	0.44 (0.18, 1.09)	0.078
> 20.57 (ref)	32	23	1.00
Aspect
Eastern or south-eastern	32	18	2.06 (0.91, 4.70)
Western or north-western	20	5	0.43 (0.14, 1.32)
	Negative households	Positive households
Elevation above baseline (1009 m)
10 m increments	1105.6 ± 46.2 m	1097 ± 48.2 m	0.95 (0.91, 0.98)	0.006	0.87 (0.81, 0.95)	0.0001
Slope	0.03 ± 0.023	0.02 ± 0.014

ISSN: 1475-2875