Methods to measure potential spatial access to delivery care in low- and middle-income countries: a case study in rural Ghana

Table 5 Spearman rank correlation coefficients (r) between different impedance measures and same health facility identified as closest using different impedance measures (%) for impedance measures calculated to closest CEmOC facility

	Euclidean distance		Network distance		Mechanized network time		Non-mechanized network time		Mechanized raster time
	r	%	r	%	r	%	r	%	r	%
Compound as origin ¹
Network distance (km)	0.9849	91.6	1
Mechanized network time (hr)	0.7388	89.4	0.7852	91.0	1
Non-mechanized network time (hr)	0.9805	91.6	0.9980	100	0.8116	97.0	1
Mechanized raster time (hr)	0.5333	68.5	0.5847	73.4	0.8868	67.8	0.6171	68.7	1
Non-mechanized raster time (hr)	0.9680	90.4	0.9852	97.8	0.8439	88.5	0.9923	90.7	0.6749	73.6
Village as origin ²
Network distance (km)	0.9714	84.8	1
Mechanized network time (hr)	0.7115	87.3	0.7576	87.5	1
Non-mechanized network time (hr)	0.9707	84.8	0.9996	100	0.7703	87.5	1
Mechanized raster time (hr)	0.6287	65.6	0.6794	65.4	0.9417	75.5	0.6931	65.4	1
Non-mechanized raster time (hr)	0.9703	84.1	0.9949	98.6	0.7905	87.1	0.9966	98.6	0.7232	65.8

ISSN: 1476-072X