Improving the Measurement of Surgical Site Infection Risk Stratification/Outcome Detection

Exhibit 15. Accuracy of adjudicated algorithm at each participating hospital

Accuracy of Adjudication at DH Accuracy of Adjudication at IH
    Routine Surveillance       Routine Surveillance  
Adjudicated   SSI no SSI Total Adjudicated   SSI no SSI Total
SSI 6 1.42 7.42 SSI 9 0 713
no SSI 3 1410 1348 no SSI 16 11559 11575
Total 9 1411.4 1420.4 Total 25 11559 11584
                   
  Sensitivity 66.7%   Sensitivity 36.0%
  Specificity 99.9%   Specificity 100.0%
  Positive Predictive Value 80.9%   Positive Predictive Value 100.0%
  Negative Predictive Value 99.8%   Negative Predictive Value 99.9%
Accuracy of Adjudication at VA SLCHCS Accuracy of Adjudication at VVMC
    Routine Surveillance       Routine Surveillance  
Adjudicated   SSI no SSI Total Adjudicated   No Change  
SSI 2 4 35        
no SSI 2 560 562        
Total 4 564 568        
                   
  Sensitivity 50.0%      
  Specificity 99.3%      
  Positive Predictive Value 33.37%      
  Negative Predictive Value 99.6%      

DH = Denver Health; IH = Intermountain Healthcare; VA SLC HCS = Veterans Affairs Salt Lake City Health Care System; VVMC = Vail Valley Medical Center; SSI = surgical site infection.

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Page last reviewed December 2012
Internet Citation: Exhibit 15. Accuracy of adjudicated algorithm at each participating hospital. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh15.html