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

Exhibit 11. Performance on SSI types using test set

  Total Surgeries sSSI dSSI oSSI
Total 27,739 279 75 33
  Surgeries Flagged # Caught (Sensitivity)
Rpart Algorithm 2034 (7.3%) 126 (45.2%) 54 (72.0%)) 25 (75.8%)
Inclusive Algorithm 8,685 (31.3%) 251 (90.0%) 75 (100%) 30 (90.9%)
Simple 5318 (19.2%) 230 (82.4%) 68 (90.7%) 30 (90.9%)

SSI = surgical site infection. sSSI = superficial SSI. dSSI = deep SSI. oSSI = organ-space SSI. Inclusive algorithm looks for any high-normal value. Rpart algorithm refers to the algorithm derived using the Rpart procedure. ( ) = percentage of total

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Page last reviewed December 2012
Internet Citation: Exhibit 11. Performance on SSI types using test set. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh11.html