Table 1.

Characteristics of Weighting Structure between Study Participants, Postal Areas, Hospital Service Areas (HSAs), and Weighted Hospital Service Area Networks (Weighted‐HSANs)

	Mean	Interquartile Range	Min–max
Postal areas (n = 593)
Number of study participants	451	82–561	1–4,166
Number of all‐cause hospitalizations	450	63–518	1–5,642
Number of public hospitals of admission	15	8–20	1–56
% all‐cause hospitalizations to the
Most common hospital	67	51–81	23–100
Second most common hospital	17	7–25	0–50
Third most common hospital	6	2–9	0–31
Hospital service areas (n = 72)
Study patient catchment size	3,705	1160–5798	12–12,801
Postal areas included	8	3–12	1–27
Market share index (%)	69	64 ‐ 87	0–97
Hospitals, from weighted‐HSANs (n = 79)
Weighted study patient catchment size	3,377	973–5720	277–13,227
Total postal areas serviced	111	50–136	17–377
Where hospital weight >5%	19	8–22	1–73
Where hospital weight >10%	14	6–17	0–57
Where hospital weight >20%	10	4–14	0–44
Where hospital weight >50%	6	1–10	0–26
Study participants (n = 266,762)
Number of hospitals in weighted‐HSAN	26	15–34	1–56
% weighting which is to the:
Most common hospital	70	54–85	23–100
Second most common hospital	14	4–22	0–50
Third most common hospital	5	2–6	0–31