Table 2. Characteristics of intraoperative factors of the patients, according to smoking status and pack-years exposure.
| Variables | Smoking status | pack-years exposure | ||||||
|---|---|---|---|---|---|---|---|---|
| Active Smoker (N = 38) | Ex-smoker (N = 6) | Non-smoker (N = 113) | P value | Severe smoker (N = 15) | Light smoker (N = 29) | Non-smoker (N = 113) | P value | |
| Operation time (min) | 420 (375, 465) | 435 (356, 491) | 375 (330, 440) | 0.037 | 435 (390, 485) | 405 (363, 450) | 375 (330, 440) | 0.013 |
| Anhepatic phase (min) | 59.32±12.38 | 51.4±7.16 | 51.7±11.98 | 0.009 | 57.4±9.1 | 58.6±13.3 | 51.7±12.0 | 0.022 |
| Intraoperative blood loss (ml) | 2000 (1000, 4000) | 3500 (1187, 5000) | 2000 (1000, 4000) | 0.503 | 1700 (1000, 4000) | 2500 (1200, 5000) | 2000 (1000,4000) | 0.479 |
| Total input quantity (ml) | 7245 (5750, 9712) | 7730 (5575, 8975) | 6700 (5095, 8365) | 0.335 | 7710 (6360, 10500) | 7230 (5590, 8960) | 6700 (5095, 8365) | 0.224 |
| Warm ischemia time (min) | 8 (8, 10) | 8 (8, 10) | 8 (8, 10) | 0.355 | 8 (8, 11) | 8 (8, 10) | 8 (8, 10) | 0.974 |
| Cold ischemia time (h) | 5 (4, 4.5) | 6 (4.5, 6) | 5 (4, 6) | 0.296 | 4 (4, 5) | 5 (4, 6) | 5 (4, 6) | 0.33 |
Normal distribution variables are reported as means ± standard deviations (SD) and compared by the student’s t-test. Abnormal distribution variables are reported as medians (interquartile range, IQR) and compared by the Mann-Whitney rank-sum test. Categorical variables are reported as numbers and percentages and compared by the Chi-squared analysis or Fisher’s exact test.