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Exhibits 32 to 34

Exhibit 32. Results of logistic regression using the derivation dataset for only CABG surgeries.

VariableEstimatetValueProbability
Intercept-10.9133-4.255110.00002
Transfer admission1.2851042.2349720.02542
BMI0.1117393.7588520.00017
History of MRSA2.2145993.2134440.00131
Postop admission2.034573.3973030.00068
Preop hematocrit0.1459331.8810710.06342
Preop hemoglob-0.1963-0.868470.39360
Surgery duration-0.00573-2.028650.04249

BMI = body mass index; MRSA = methicillin-resistant Staphylococcus aureus; Postop = postoperative; Preop = preoperative.

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Exhibit 33. Results of logistic regression using the validation dataset for only CABG surgeries.

VariableEstimatetValueProbability
Intercept-4.41194-2.003110.04533
Transfer admission-0.36612-0.465160.64182
BMI0.0876112.6105830.00904
History of MRSA1.0728241.3205660.18665
Postop admission0.6460261.2447470.21324
Preop hematocrit0.0272580.2748140.78942
Preop hemoglob-0.20223-0.705530.50265
Surgery duration-0.00372-1.31050.19003

BMI = body mass index; MRSA = methicillin-resistant Staphylococcus aureus; Postop = postoperative; Preop = preoperative.

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Exhibit 34. Results of logistic regression using the combined dataset for only CABG surgeries

VariableEstimatetValueProbability
Intercept-7.01035-4.295610.00002
Transfer admission0.6164731.4200470.15560
BMI0.0951854.3500310.00001
History of MRSA1.5655993.0986490.00195
Postop admission1.2672143.4459550.00057
Preop hematocrit0.0870341.5799510.12344
Preop hemoglob-0.22319-1.516170.14453
Surgery duration-0.00477-2.364020.01809

BMI = body mass index; MRSA = methicillin-resistant Staphylococcus aureus; Postop = postoperative; Preop = preoperative.

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Current as of December 2012
Internet Citation: Exhibits 32 to 34. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh32-34.html