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Table 2 Baseline Hospital Characteristics (2003–2009)

From: Hospital market concentration and the use of mechanical circulatory support devices in acute myocardial infarction complicated by cardiogenic shock

  Competitive / Unconcentrated Moderately Concentrated Highly Concentrated p-value
(n = 10,873) (n = 6526) (n = 15,007)
Hospital bed size     < 0.01
 Small 793 (7.3%) 532 (8.2%) 730 (4.9%)  
 Medium 2521 (23.2%) 1028 (15.8%) 3069 (20.5%)  
 Large 7529 (69.2%) 4959 (76.0%) 11,135 (74.2%)  
 Unknown 30 (0.3%) 7 (0.1%) 73 (0.5%)  
Teaching status 8112 (74.6%) 3771 (57.8%) 5497 (36.6%) < 0.01
Location     < 0.01
 Urban 10,591 (97.4%) 6510 (99.8%) 13,743 (91.6%)  
 Rural 252 (2.3%) 9 (0.1%) 1191 (7.9%)  
 Unknown 30 (0.3%) 7 (0.1%) 73 (0.5%)  
Hospital control     < 0.01
 Government or private 8676 (79.8%) 4164 (63.8%) 7544 (50.3%)  
 Government, nonfederal 40 (0.4%) 50 (0.8%) 1122 (7.5%)  
 Private, non-profit 1410 (13.0%) 1411 (21.6%) 3811 (25.4%)  
 Private, investor-own 717 (6.6%) 885 (13.6%) 1816 (12.1%)  
 Private, other 0 (0.0%) 9 (0.1%) 641 (4.3%)  
 Unknown 30 (0.3%) 7 (0.1%) 73 (0.5%)