Table 1.

Demographic and clinical characteristics of patients

Characteristic	Total (n = 103)	CRT^[−] group (n = 45)	CRT^[+] group (n = 58)
Age, years	53.6 (8.2)^a	54.4 (8.0)^a	53.1 (8.4)^a
Gender (male:female)	100:3 (97%:3%)	44:1 (98%:2%)	56:2 (97%:3%)
Tumor location (upper:middle:lower)	25:52:26 (24%:51%:25%)	9:21:15 (20%:47%:33%)	16:31:11 (28%:53%:19%)
T-stage (T0:T1:T2:T3:T4)	28:30:14:20:11 (27%:29%:14%:19%:11%)	2:26:7:9:1 (4%:58%:16%:20%:2%)	26:4:7:11:10 (45%:7%:12%:19%:17%)
Tumor grade^b (G1:G2:G3)	4:60:11^b (5%:80%:15%)	2:36:5^b (5%:84%:11%)	2:24:6^b (6%:75%:19%)
Tumor size, cm	2.7 (1.4)^a	2.7 (1.3)^a	2.7 (1.5)^a
Tumor SUV_max	5.0 (3.0)^a	5.3 (2.9)^a	4.7 (3.0)^a
CRT to PET/CT interval, days	N/A	N/A	52.2 (48.5)^a
PET/CT to resection interval, days	24.4 (20.1)^a	21.2 (20.9)^a	26.8 (19.4)^a

^aData are means (standard deviation)

^bTumor histological grade was not assessment in patients with resected tumor specimens classified as T0

CRT chemoradiotherapy, PET/CT positron emission tomography/computed tomography, SUV _max maximal standardized uptake value