The Use of FTIR-ATR Spectrometry for Evaluation of Surgical Resection Margin in Colorectal Cancer: A Pilot Study of 56 Samples

Table 3

FTIR spectrum comparisons of Parts A, B, C, and D (rank-sum results).

Variable	Part A		Part B		Part C		Part D		Z	p
	n	Median	n	Median	n	Median	n	Median
P/cm^−1
𝑃2925	14	2918.3	14	2919.0	14	2927.2	14	2926.4	−2.358	0.023*
𝑃1080	14	1083.80	14	1083.8	14	1079.9	14	1078.40	−2.179	0.032*
𝐼/𝐼
𝐼1740/𝐼1460	14	0.42	14	0.44	14	0.55	14	0.51	−1.074	0.065

P stands for the peak position of band; I stands for the intensity of band; ^∗𝑝<0.05.