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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
| 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 |
