Table 3.

Observed and Risk-adjusted Mortality Rates for Hospital Volumes and Complexity Groups

Annual
Hospital
Volume
IIIIIIIVTotal
% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR
<10042.21.859.1633.05.769.2434.313.358.78*36.222.227.3438.27.528.26*
≥10057.81.055.0567.03.855.6365.79.725.7963.818.916.4161.86.285.95
Total1001.391004.4810010.9710020.111006.75
Observed and Risk-adjusted Mortality Rates for Surgeon Volumes and Complexity Groups
Annual
Surgeon
Volume
IIIIIIIVTotal
% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR% in
Group
OMRRAMR
<7533.72.0710.2326.34.687.4725.515.699.82*34.223.537.8030.78.468.77*
≥7566.31.055.0473.74.416.5174.59.365.7365.818.336.2069.35.995.90
Total1001.391004.4810010.9710020.111006.75
  • Abbreviations: OMR, observed mortality rate; RAMR, risk-adjusted mortality rate.

  • * Risk-adjusted rate is significantly higher than statewide rate (P < .05).

  • Risk-adjusted rate is significantly lower than statewide rate (P < .05).