Table 3A:

Characteristics of Sampling Design by Complexity Score Contribution from Hospitals

Number of Hospitals	System Characteristics			Surveys to Expend	Corporate Parent		Hospital & Practice
	N Hospitals	N Practices	N Own Sub		N	% Sampled	N	% Sampled
0	0	6.1	0	4.8	602	45.3	3681	32.1
1	1	2.8	0.1	4.2	377	37.8	1421	37
2	2	3.2	0.2	5.2	196	44.3	1019	42.4
3	3	4.8	0.2	6.7	92	51.9	717	42.2
4	4.4	5.7	0.5	8.2	100	63.4	1006	48.4
5	7.4	8.5	1.2	10.1	90	73.4	1431	43.8
6	13.7	9.7	1.3	11.2	39	81.9	914	36.2
7	27.6	13.1	4.9	13.2	11	96.5	448	29
8	54.5	12.5	6.5	14.5	2	99	134	20
9	81	4	0	14	1	100	85	15.3
10	179	33	13	18	1	100	212	8

Note: The component of the complexity score for hospitals is a monotone function of the number of hospitals