Real-time in vivo distal margin selection using confocal laser endomicroscopy in transanal total mesorectal excision for rectal cancer

Table 1 Patient demographics and tumor characteristics

Variable	n = 43
Age: Median (IQR), yr	57 (47-65)
Sex: Male/female, n	29/14
BMI: Median (IQR), kg/m2	22.40 (19.50-23.95)
ASA class, n (%)
1	8 (18.6)
2	30 (69.8)
3	5 (11.6)
4	0
Tumor size: Median (IQR), cm	2.5 (2.0-3.8)
Tumor height1: Median (IQR), cm	4.0 (3.6-4.6)
Histological subtype, n (%)
Adenocarcinoma	39 (90.7)
Mucinous adenocarcinoma/signet ring cell carcinoma	4 (9.3)
Differentiation grade, n (%)
Well	7 (16.3)
Moderate	32 (74.4)
Poor	4 (9.3)
Neoadjuvant chemoradiotherapy, n (%)	21 (48.8)
TRG2, n (%)
Grade 0	3 (7.0)
Grade 1	10 (23.3)
Grade 2	7 (14.0)
Grade 3	1 (2.3)
T stage, n (%)
T0	5 (11.6)
T1	4 (9.3)
T2	17 (39.5)
T3	13 (30.2)
T4	4 (9.3)
N stage, n (%)
N0	30 (69.8)
N1	10 (23.3)
N2	3 (7.0)
M stage, n (%)
M0	43 (100)
M1	0

¹Height of the distal edge of the tumor from the anal verge.

²Tumor regression grade.

BMI: Body mass index; ASA: American Society of Anesthesiologists; TRG: Tumor Regression Grade; IQR: Interquartile range.