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Table 1 Supply factors associated with expressed and revealed preference

From: Choice in maternity care: associations with unit supply, geographic accessibility and user characteristics

Supply factors Reason for choice is proximity (NPS1) Closest unit was chosen (VS2)
  N % N %
  9657 36.4 736358 62.1
Distance to the closest maternity unit (km)     
<5 4405 37.7 337566 62.9
5-14 2571 36.8 193939 61.9
15-29 2049 34.2 153919 62.3
30+ 630 33.5 50934 55.9
p   0.0197   <0.001
Distance between 1st and 2nd closest maternity unit (km)     
0 3891 25.1 287061 78.33
1-4 2089 31.8 165762 32.8
5-14 2028 42.5 153782 49.4
15-29 1051 56.9 83828 74.7
30+ 596 69.8 45925 85.5
p   <0.001   <0.001
Units in a 15 km radius     
0 2680 34.0 204786 60.7
1 1727 55.7 130133 73.2
2 1356 31.6 99009 79.7
3 1045 25.1 71883 79.0
4-9 1167 31.0 93953 54.9
10+ 1682 35.3 136594 36.7
p   <0.001   <0.001
  1. 1NPS: National Perinatal Survey.
  2. 2VS: Vital Statistics Registry.
  3. 3When units are located in the same commune, the distance between them is computed as zero; units in the same commune are all considered to be closest.