Prognostic value of preoperative mean corpuscular volume in esophageal squamous cell carcinoma

Table 3 Comparison of prognosis in specified cohort stratified by preoperative mean corpuscular volume

Variable	Case numbers	Overall survival (mo)(mean ± SE)	P valueLog-Rank test
All cohort			< 0.001
Low	239	33.7 ± 24.7
High	59	25.8 ± 24.2
pT status
T1-T2			0.075
Low	75	39.1 ± 27.1
High	10	27.6 ± 22.7
T3			< 0.001
Low	164	31.2 ± 23.2
High	49	25.4 ± 24.7
pN status
N0			0.464
Low	116	40.0 ± 26.0
High	22	35.5 ± 28.7
N1-N3			< 0.001
Low	123	27.9 ± 22.0
High	37	20.0 ± 19.2
Histologic grade
G1			0.211
Low	71	32.9 ± 27.6
High	23	27.4 ± 24.3
G2-G3			< 0.001
Low	168	34.1 ± 23.4
High	36	24.8 ± 24.4
pTNM stage
Stage I			0.581
Low	32	37.9 ± 27.1
High	5	37.6 ± 32.6
Stage II			0.061
Low	100	39.6 ± 25.4
High	20	31.1 ± 27.7
Stage III			0.001
Low	107	27.0 ± 21.6
High	34	20.9 ± 19.8

Low: Low preoperative mean corpuscular volume (≤ 95.6 fl); High: High preoperative mean corpuscular volume (> 95.6 fl).