Table 2 Clinical characteristic of esophageal squamous cell carcinoma patients with stage T1–3N0M0 from SEER database

Variables

P value

 Sex, n (%)

0.853^*

  Male

87 (57.6%)

57 (58.2%)

30 (56.6%)

  Female

64 (42.4%)

41 (41.8%)

23 (43.4%)

 Race, n (%)

0.001^***

  White patients

104 (68.9%)

69 (70.4%)

35 (66.0%)

  Black patients

26 (17.2%)

22 (22.4%)

4 (7.6%)

  Other patients

21 (13.9%)

7 (7.2%)

14 (26.4%)

 Age (year), n (%)

0.155^*

   ≤ 60

42 (27.8%)

31 (31.6%)

11 (20.8%)

   > 60

109 (72.2%)

67 (68.4%)

42 (79.2%)

 Tumor differentiation, n (%)

0.325^*

  Well

20 (13.2%)

10 (10.2%)

10 (18.9%)

  Moderate

82 (54.3%)

55 (56.1%)

27 (50.9%)

  Poor

49 (32.5%)

33 (33.7%)

16 (30.2%)

 pT stage, n (%)

0.126^*

  T1

61 (40.4%)

40 (40.8%)

21 (39.6%)

  T2

30 (19.9%)

15 (15.3%)

15 (28.3%)

  T3

60 (39.7%)

43 (43.9%)

17 (32.1%)

 Tumor location, n (%)

0.129^***

  Upper

15 (9.9%)

13 (13.3%)

2 (3.8%)

  Middle

75 (49.7%)

49 (50.0%)

26 (49.1%)

  Lower

61 (40.4%)

36 (36.7%)

25 (47.1%)

 Tumor length (cm)

  Median (interquartile range)

3.0 (2.6)

3.5 (2.5)

2.5 (2.5)

0.121^**