Table 2. Univariate survival analysis (Kaplan–Meier).

Characteristic	No. of cases	Mean survival time (months±s.e.)	Median survival time (months±s.e.)	P-value
Histology
Adeno	49	39±4	36±10	0.566
SCC	40	32±3	30±4
Grading
G1&2	47	45±4	46	0.001
G3	42	24±3	19±3#
Tumour size (pT)
pT1	22	47±5	n.r.a	0.083
pT2+	67	32±3	30±4
Nodal status
PN0	53	45±4	n.r.	0.0001
PN1+	36	22±3	18±3
Stage
I–II	62	44±3	46	0.0005
III	27	21±3	17±5
CD24 expression
Low	49	40±3	38	0.033
High	40	31±4	23±3

^an.r.=not reached.