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Table 1 Patient characteristics and postoperative C-reactive protein levels grouped by VO2 at the anaerobic threshold and at peak exercise

From: The relationship between cardiopulmonary exercise test variables, the systemic inflammatory response, and complications following surgery for colorectal cancer

Characteristic Cardiopulmonary exercise test variable
VO2 at AT < 11 ml/kg/min (n) VO2 at AT > 11 ml/kg/min (n) P VO2 at peak < 19 ml/kg/min (n) VO2 at peak > 19 ml/kg/min (n) P
Preoperative
 Age (< 65/65–74/> 74) 5/8/11 3/7/4 0.488 4/9/12 4/6/3 0.130
 Sex (male/female) 19/5 11/3 1.000 19/6 11/2 0.689
 ASA (1/2/3/4) 0/11/12/1 2/8/4/0 0.041 0/10/14/1 2/9/2/0 0.004
 BMI (< 20/20–25/36–30/> 30, kg/m2) 1/4/7/12 1/4/5/4 0.206 1/4/7/13 1/4/5/3 0.106
 Smoker (never/ex/current) 11/9/4 6/6/2 0.981 10/12/3 10/12/3 0.912
 Site (colon/rectum) 16/8 7/7 0.492 17/8 6/7 0.295
 TNM stage (I/II/III/IV) 2/12/9/0 3/7/3/1 0.510 3/13/9/0 2/6/3/1 0.969
 Preop mGPS (0/1–2) 14/8 11/2 0.259 13/9 12/1 0.036
 Neoadjuvant (yes/no) 1/23 2/12 0.542 0/25 3/10 0.034
Intraoperative
 Approach (open/lap) 6/18 8/6 0.081 4/21 10/3 < 0.001
 Stoma (yes/no) 10/13 6/8 1.000 11/13 5/8 0.666
 Transfusion (yes/no) 1/20 0.10 1.000 1/20 0/10 1.000
 Surgery > 4 h (yes/no) 14/10 6/8 0.503 16/9 4/9 0.087
Postoperative
 Any complication (yes/no) 9/15 6/8 1.000 10/15 5/8 1.000
 Clavien Dindo grade 3–5(yes/no) 8/16 2/12 0.268 2/23 1/12 1.000
 Length of stay (median, range, days) 8 (3–19) 8 (5–15) 0.790 8 (3–15) 9 (5–19) 0.169
 POD 3 CRP > 150 mg/l (yes/no) 11/12 8/4 0.476 12/12 7/4 0.493
 POD 4 CRP > 150 mg/l (yes/no) 5/12 5/9 0.709 6/13 4/8 0.919
  1. ASA American Society of Anesthesiology, BMI body mass index, AT anaerobic threshold, mGPS modified Glasgow Prognostic Score, POD postoperative day, CRP C-reactive protein