Using GPS technology to (re)-examine operational definitions of ‘neighbourhood’ in place-based health research

Table 4 Variation in percentage land-use exposure by buffer (n = 32)

Land-use type	Circular buffer		Polygon Network buffer		Line-based network buffer		Variable width buffer		RIC polygon buffer		RIC ellipse buffer		RIC line buffer
Land-use type	Med	IQR	Med	IQR	Med	IQR	Med	IQR	Med	IQR	Med	IQR	Med	IQR
Commercial (%)	4.14	6.75	3.50	7.21	3.10	6.33	3.59	6.67	7.96	12.18	17.61	27.10	9.34	14.35
Institutional (%)	3.94	6.72	2.64	4.14	1.95	2.81	2.20	4.81	3.93	8.61	3.38	6.57	3.94	5.42
Recreational and park (%)	5.90	4.87	5.21	7.00	4.13	4.63	5.97	4.59	6.44	6.16	5.07	9.10	4.32	9.23
Industrial (%)	0.20	1.11	0.04	0.48	0.05	0.47	0.10	0.76	0.27	1.36	0.05	1.60	0.00	0.87
Residential (%)	39.70	15.96	47.23	17.49	42.26	14.19	42.26	14.19	41.25	16.08	32.71	25.57	33.93	16.90
Utilities/Communications (%)	0.37	0.95	0.28	0.97	0.31	1.02	0.30	0.82	0.34	0.55	0.54	1.16	0.12	0.62
Other (%)	36.51	17.16	36.55	13.27	38.55	14.81	36.07	12.67	31.74	12.04	30.69	15.07	38.57	13.50

ISSN: 1476-072X