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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: JAMA Surg. 2013 Jun;148(6):10.1001/jamasurg.2013.1699. doi: 10.1001/jamasurg.2013.1699

Table 1.

Characteristics of IDS-Affiliated Hospitals Compared With Non–IDS-Affiliated Hospitalsa

Characteristic IDS-Affiliated Hospitals (n = 374) Non–IDS-Affiliated Hospitals (n = 374) P Value
Hospital characteristic
    Mean No. of total beds 281 308 .08
    Median No. of total beds 209 276 <.001
    Mean No. of annual Medicare discharges 5725 6576 .004
    Median No. of annual Medicare discharges 4407 6003 <.001
    Teaching hospitals, % 17.17 17.38 .94
Median Medicare case volume, No.
    CABG 272 269 .74
    Back surgery 173 169 .77
    Hip replacement 125 168 <.001
    Colectomy 66 75 .045
Mean Medicare case volume, No.
    CABG 374 327 .13
    Back surgery 239 210 .14
    Hip replacement 182 192 .39
    Colectomy 82 83 .82

Abbreviations: CABG, coronary artery bypass grafting; IDS, integrated delivery system.

a

The case volumes presented are limited to hospitals that performed at least 30 of the procedures of interest during the study interval.