Table 1.

Variables Included in the Propensity Score Logistic Regression

Categorical

Preoperative

Sex (M/F*)

ASA Class (1*-4)

Diabetes (Y/N*)

Current smoker within 1 y (Y/N*)

Chronic steroid use (Y/N*)

Receipt of neoadjuvant therapy for hepatic disease within 90 d of operation (Y/N*)

Intraoperative

Operative approach: laparoscopic* or open

Extent of resection: CPT 47120*, 47122, 47125, or 47130

Pringle maneuver (Y/N*)

Concurrent intraoperative ablation (Y/N*)

Intraoperative or postoperative (< 72 h) transfusion (Y/N*)

Continuous

Preoperative

Age

BMI

Albumin

Creatinine

INR

Platelet count

Serum glutamic oxaloacetic transaminase

Alkaline phosphatase

Intraoperative

Operating room time

Concurrent partial resections

Group variable: operative site drainage

^*Reference group.

INR, International Normalized Ratio