Concurrent three-dimensional conformal radiotherapy and chemotherapy for postoperative recurrence of mediastinal lymph node metastases in patients with esophageal squamous cell carcinoma: a phase 2 single-institution study

Table 1 Patient characteristics

Characteristic	Group A	Group B	χ ²	P
	(n = 49)	(n = 49)
Gender
Male	32	35	0.425	0.514
Female	17	14	0.425	0.514
KPS	80.5 ± 2.13	81.2 ± 1.71	1.794^*	0.076
Age (years)
Median (range)	54 (38–71)	52 (40–69)	1.515^*	0.133
Recurrence time (months)
Median (range)	11.4 (6–24)	12.2 (7–23)	1.978^*	0.051
Recurrent tumor size (cm³)	9.84 ± 3.32	10.23 ± 4.13	0.515^*	0.608
Anatomic recurrence (number)	11	13	0.221	0.638
Postoperative pathological stage
I + II	30	27	0.377	0.538
III + IV	19	22	0.377	0.538
Recurrence of locoregional lymph node metastases (number)
≤2	38	40	0.251	0.616
>2	11	9

ISSN: 1748-717X