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Exhibits 44 to 46

Exhibit 44. Results of logistic regression using the derivation dataset for only appendectomy

VariableEstimatetValueProbability
Intercept-3.45066-1.049670.31289
History of cancer0.8963030.9748590.32970
Emergency surgery0.32970-0.966430.33384
Male0.4886660.7685740.768574
Postop admission2.4532473.6529260.00026
Postop hematocrit-0.17629-2.120840.04042
Postop hemoglobin0.2722090.8220760.42317
Preop hemoglobin-0.0374-0.03740.79751

Postop = postoperative; Preop = preoperative.

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Exhibit 45. Results of logistic regression using the validation dataset for only appendectomy

VariableEstimatetValueProbability
Intercept-4.59592-2.061510.04255
History of cancer0.8558320.7368140.46124
Emergency surgery0.6559771.1724650.24101
Male0.5867341.0194880.30824
Postop admission2.5725954.9316890.00000
Postop hematocrit-0.15581-1.689120.09748
Postop hemoglobin0.3105951.1636950.24698
Preop hemoglobin-0.04081-0.316940.75426

Postop = postoperative; Preop = preoperative.

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Exhibit 46. Results of logistic regression using the combined dataset for only appendectomy

VariableEstimatetValueProbability
Intercept-3.90766-2.43780.01642
History of cancer0.7490831.0680610.28549
Emergency surgery0.1306440.3319690.73991
Male0.6196571.4714670.14148
Postop admission2.5152716.194060.00000
Postop hematocrit-0.15793-2.740040.00744
Postop hemoglobin0.3046091.4390650.16263
Preop hemoglobin-0.07631-0.68290.51247

Postop = postoperative; Preop = preoperative.

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Page last reviewed December 2012
Internet Citation: Exhibits 44 to 46. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh44-46.html