A suite of methods for representing activity space in a healthcare accessibility study

Table 4 Correspondence of actual healthcare destination with area and number of primary care opportunities. Among respondents reporting at least one visit to a health care provider in the past year and providing locational data for a provider (n = 807). Spearman's rank correlation. SDE1 = standard deviational ellipse at 1 standard deviation; SDE2 = standard deviational ellipse at 2 standard deviations; RNB = road network buffer; STT = standard travel time polygon; RTT = relative travel time polygon.

	Activity space measures
	SDE1	SDE2	RNB	STT	RTT
Percent of respondents whose reported health destination is inside the activity space
Total	40.2	62.3	58.6	86.1	81.7
By Area of Activity Space (quartiles)
Smallest – 1^st	22.3	47.7	46.2	77.9	58.3
2^nd	37.3	57.9	55.8	86.6	83.6
3^rd	44.2	69.5	70.4	87.8	88.5
4^th	57.1	75.7	61.9	93.0	95.6
By Number of Primary Care Opportunities (quartiles)
Fewest – 1^st	13.5	39.0	29.9	58.7	44.4
2^nd	36.3	58.5	46.4	64.5	63.2
3^rd	51.3	71.9	50.8	68.5	70.1
4^th	67.0	80.9	54.7	74.6	75.1
Correlations
between health destination inside and area of activity space	.267	.242	.152	.166	.343
between heath destination inside and number of primary care opportunities	.496	.360	.241	.219	.362

ISSN: 1476-072X