Delaying surgery after neoadjuvant chemoradiotherapy improves prognosis of rectal cancer

Table 4 Analysis of the effect of factors on pathological tumor regression grade

TRG	Relationship between demographics and TRG (p) and OR with 95%CI					Distribution and comparison of TRG rates in both groups
	Age	Sex	Tumor localization	Preop T stage	Preop stage	Group I (n = 45)	Group II (n = 42)	P value
						%	%
Complete response	(0.46)	(0.84)	(0.17)	(0.24)	(0.48)	(n = 4)	(n = 8)	0.36
	2.19, 95%CI: 0.55-8.72	0.54, 95%CI: 0.12-2.29	0.66, 95%CI: 0.15-2.92	1.00, 95%CI: 0.90-1.50	1.21, 95%CI: 0.12-11.8	8.9	19
Near complete response	(0.91)	(0.79)	(0.38)	(0.75)	(0.80)	(n = 9)	(n = 14)	0.35
	1.02, 95%CI: 0.37-2.79	1.11, 95%CI: 0.36-3.38	1.93, 95%CI: 0.64-5.8	0.50, 95%CI: 0.12-2.57	0.36, 95%CI: 0.10-1.51	20	33.3
Minimal response	(0.79)	(0.59)	(0.12)	(0.66)	(0.38)	(n = 12)	(n = 16)	0.15
	0.67, 95%CI: 0.25-1.76	1.25, 95%CI: 0.43-3.63	0.45, 95%CI: 0.16-1.20	2.25, 95%CI: 0.36-13.8	2.02, 95%CI: 0.37-10.9	26.7	38.1
Poor response	(0.48)	(0.95)	(0.11)	(0.19)	(0.70)	(n = 20)	(n = 4)	0.002
	0.98, 95%CI: 0.35-2.76	0.94, 95%CI: 0.31-2.82	1.65, 95%CI: 0.56-4.84	3.22, 95%CI: 0.92-11.2	1.34, 95%CI: 0.23-7.62	44.4	9.5

P < 0.05 is statistical significance. OR: Odds ratio; TRG: Tumor regression grade.