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

Exhibit 17. Sensitivity and positive predictive values of algorithms alone

  IH VA SLC DH
Algorithm SN PPV SN PPV SN PPV
rpart 10/25 (40%) 10/896 (1.1%) 2/4 (50%) 2/35 (5.7%) 6/13 (46.2%) 6/77 (7.8%)
Simple 13/25 (52%) 13/1100 (1.2%) 2/4 (50%) 2/106 (1.9%) 5/13 (38.5%) 5/157 (3.2%)
Inclusive 21/25 (84%) 21/7250 (0.3%) 2/4 (50%) 2/184 (1.1%) 11/13 (84.6%) 11/381 (2.9%)

IH = Intermountain Health. VA SLC = VA Salt Lake City Health Care System. DH = Denver Health. rpart = algorithm developed using recursive partitioning. SN = sensitivity. PPV = positive predictive value.

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Page last reviewed December 2012
Internet Citation: Exhibit 17. Sensitivity and positive predictive values of algorithms alone. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh17.html