Table 2 –

Hospital characteristics according to hospital volume (by hospital)

	Low-volume hospitals N=723 (83%)	Medium-volume hospitals N=126 (14%)	High-volume hospitals N=25 (3%)	P value
Hospital size
≤200 hospital beds	188 (26%)	6 (5%)	2 (8%)	<0.001
201–400 hospital beds	348 (49%)	31 (25%)	4 (16%)
401–600 hospital beds	124 (17%)	46 (36%)	5 (20%)
>600 hospital beds	55 (8%)	43 (34%)	14 (56%)
Critical care
Cardiac ICU	464 (70%)	106 (88%)	17 (77%)	<0.001
Surgical specialty services
Lung transplant center	17 (3%)	34 (28%)	16 (70%)	<0.001
Kidney transplant center	72 (11%)	76 (63%)	19 (83%)	<0.001
Bariatric surgery center	318 (49%)	89 (73%)	17 (74%)	<0.001
Medical specialty services
Complex medical oncology services±	54 (8%)	69 (57%)	22 (96%)	<0.001
Cardiac catheterization laboratory	564 (85%)	117 (94%)	20 (87%)	0.048
Radiology services
PET scanner	242 (37%)	85 (70%)	21 (91%)	<0.001
Nursing care
>200 FTE RNs per 100 beds	96 (13%)	46 (37%)	18 (72%)	<0.001
Teaching status
Member of council of teaching hospitals	107 (15%)	81 (64%)	22 (88%)	<0.001

^±indicated by the presence of a bone marrow transplant unit

ICU = intensive care unit; PET = positron emission tomography; FTE = full-time equivalent; RN = registereds nurse