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Table 1 Characteristics of all patients (n = 125)

From: A re-irradiation dose of 55–60 Gy improves the survival rate of patients with local recurrent esophageal squamous cell carcinoma after radiotherapy

Characteristics

LD group (%)

HD group (%)

χ2/t

P

Gender

    

Male

35 (60.3)

49 (73.1)

2.307

0.129

Female

23 (39.7)

18 (26.9)

  

Age

    

Mean ± SD

69.34 ± 8.13

68.18 ± 7.53

0.832

0.407

ECOG

    

0–1

48 (82.8)

54 (80.6)

0.097

0.756

2

10 (17.2)

13 (19.4)

  

Recurrence pattern

    

PR

35 (60.3)

32 (47.8)

1.614

0.446

LNR

11 (19.0)

14 (20.9)

  

PR + LNR

12 (20.7)

21 (31.3)

  

Initial radiation dose (Gy)

    

Mean dose

58.69 ± 3.10

59.22 ± 2.76

1.01

0.310

Time to recurrence (months)

    

 ≤ 24

36 (62.1)

32 (47.8)

2.57

0.109

 > 24

22 (37.9)

35 (52.2)

  

Re-radiotherapy technology

    

3D-CRT

25 (43.1)

34 (50.7)

0.73

0.393

IMRT

33 (56.9)

33 (49.3)

  

Chemotherapy

    

Yes

25 (43.1)

36 (53.7)

1.405

0.236

No

33 (56.9)

31 (46.3)

  
  1. SD standard deviation, ECOG Eastern Cooperative Oncology Group Performance Status, PR primary recurrence, LNR local lymph node recurrence, 3D-CRT three-dimensional conformal radiotherapy, IMRT intensity modulated radiotherapy