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Retrospective Cohort Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. Sep 27, 2026; 18(9): 121221
Published online Sep 27, 2026. doi: 10.4240/wjgs.121221
Table 2 Intraoperative, oncological, and analgesic parameters, n (%)/mean ± SD/median (interquartile range)
Variable
Control group
Observation group
Test
P value
Operative time (minutes)266.78 ± 36.44234.52 ± 41.53Welch t< 0.001
Estimated blood loss (mL)284.12 ± 75.72229.36 ± 94.80Welch t0.001
ICU stay (hours)0 (0-39.50)0 (0-0)Mann-Whitney U0.055
ICU admissionχ2 test0.075
No36 (60)38 (76)
Yes24 (40)12 (24)
Total lymph nodes harvested19.98 ± 4.2819.14 ± 3.89Welch t0.282
Positive lymph nodes0.00 (0.00-1.00)0.00 (0.00-1.00)Mann-Whitney U0.662
PCA useχ2 test0.007
No13 (21.7)23 (46.0)
Yes47 (78.3)27 (54.0)
Rescue analgesic useχ2 test0.009
No31 (51.7)38 (76.0)
Yes29 (48.3)12 (24.0)
Rescue analgesic times0.00 (0.00-1.00)0.00 (0.00-0.00)Mann-Whitney U0.011


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