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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: J Am Coll Surg. 2016 Oct 26;223(6):774–783.e2. doi: 10.1016/j.jamcollsurg.2016.09.004

Table 2.

Preoperative and Intraoperative Variables Associated with the Use of Operative Site Drainage

Variable p Value OR 95% CI
ASA Classification
    1 - - --
    2 <0.001 5.2 2.6-10.2
    3 <0.001 4.3 2.2-8.5
    4 <0.001 4.1 1.9-8.6
Neoadjuvant therapy within 90 d prior to surgery 0.010 0.8 0.7-0.9
Preoperative alkaline phosphatase ≥ 100 U/L <0.001 1.4 1.2-1.7
Preoperative platelet count ≥ 450,000/μL 0.019 2.0 1.1-3.7
Operative approach
    Laparoscopic - - --
    Open <0.001 1.7 1.4-2.1
CPT
    47120 Partial lobectomy - - --
    47122 Trisegmentectomy 0.012 1.5 1.1-2.1
    47125 Left lobectomy <0.001 1.7 1.3-2.3
    47130 Right lobectomy 0.109* 1.2 1.0-1.5
Transfusion requirement <0.001 2.0 1.6-2.5
Operative time ≥ 300 min 0.004 1.3 1.1-1.6

C statistic for model = 0.663.

ASA, American Society of Anesthesiologists Physical Status Classification; CPT, Current Procedural Terminology.

*

Not significant but included for comparison (n=508).

Includes transfusions intraoperatively and up to 72 hours postoperatively.