Table 1.

Demographic and clinicopathologic characteristics of Japanese patients with esophageal squamous cell carcinoma.

Age, yr	64.6 ± 7.2 (range 48-78)
Height, cm	164.2 ± 6.2 (range 152-180)
Weight, kg	56.7 ± 9.6 (33-79)
Male/Female	46/0
Performance status, 0/1/2/unknown	23/19/3/1
Differentiation, well/moderate/poor/unknown	7/27/6/6
T1/T2/T3/T4	15/6/14/12
N0/N1	21/25
M0/M1a	39/7
Stage I/II/III/IVa	12/10/17/7

The values are the mean ± SD. Noncervical primary tumours with positive supraclavicular lymphnodes were defined as M1a.