Retrospective Study
Copyright ©The Author(s) 2025.
World J Gastrointest Surg. Jun 27, 2025; 17(6): 104545
Published online Jun 27, 2025. doi: 10.4240/wjgs.v17.i6.104545
Table 4 Comparison of volume and thickness change rates and correlation with postoperative pathological tumor regression grade

Chemotherapy ineffective group (n = 35)
Chemotherapy effective group (n = 62)
Z
P1
r
P2
Tumor volume change rate (%)41.75 (32.86, 48.52)75.20 (65.42, 82.35)7.246< 0.0010.886< 0.001
Tumor thickness change rate (%) 29.83 (24.53, 35.62)40.65 (35.28, 46.92)5.835< 0.0010.725< 0.001