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Exhibits 35 to 37

Exhibit 35. Results of logistic regression using the derivation dataset for only herniorrhaphy

VariableEstimatetValueProbability
Intercept-7.19702-2.900050.00378
No. of procedures-1.22262-1.191160.23359
Postop admission2.1056543.4343980.00059
Postop hematocrit-0.15235-2.045150.04164
Postop hemoglobin0.5583912.2822730.02329
Longer preoperative stay0.1192291.5835540.11330
History of rheumatism1.800241.4288120.15310
Wound class0.8125881.4092840.15876

Postop = postoperative; Preop = preoperative.

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Exhibit 36. Results of logistic regression using the validation dataset for only herniorrhaphy

VariableEstimatetValueProbability
Intercept-6.63084-3.11820.00195
No. of procedures0.3898461.7067240.08789
Postop admission3.4309425.1366590.00000
Postop hematocrit0.1326351.2714410.20613
Postop hemoglobin-0.42173-1.324030.18974
Longer preoperative stay0.0069930.134050.89336
History of rheumatism0.6322110.5368550.59137
Wound class0.4071130.768370.44228

Postop = postoperative; Preop = preoperative.

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Exhibit 37. Results of logistic regression using the combined dataset for only herniorrhaphy

VariableEstimatetValueProbability
Intercept-6.53827-4.09980.00007
No. of procedures0.1745940.9203220.35743
Postop admission2.7873366.5518380.00000
Postop hematocrit-0.03547-0.447840.66071
Postop hemoglobin0.0829220.3313930.74535
Longer preoperative stay0.0366021.8548430.06362
History of rheumatism1.2269351.511360.13070
Wound class0.4907761.442290.14923

Postop = postoperative; Preop = preoperative.

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Current as of December 2012
Internet Citation: Exhibits 35 to 37. December 2012. Agency for Healthcare Research and Quality, Rockville, MD. http://www.ahrq.gov/research/findings/final-reports/ssi/ssiexh35-37.html