Clinical features, outcomes and treatment-related pneumonitis in elderly patients with esophageal carcinoma

Table 1 Biological characteristics of tumors in elderly and non-elderly patients with esophageal carcinoma n (%)

Clinicopathological parameter	n	Non-elderly	Elderly	P
Gender				0.098
Male	180	93 (51.7)	87 (48.3)
Female	56	36 (64.3)	20 (35.7)
Tumor location				0.066
Cervical esophagus and upper thoracic portion	64	29 (43.3)	38 (56.7)
Mid-thoracic portion	49	61 (57.0)	46 (43.0)
Lower thoracic portion		39 (62.9)	23 (37.1)
Tumor type				0.000
Adenocarcinoma	31	27 (87.1)	4 (12.9)
Squamous cell carcinoma	205	102 (49.8)	103 (50.2)
Distant metastasis				0.021
M0	216	123 (56.9)	93 (43.1)
M1	20	6 (30.0)	14 (70.0)
Recurrence and metastasis after radiotherapy				0.008
Yes	143	88 (61.5)	55 (38.5)
No	93	41 (44.1)	52 (55.9)
Lymph node metastasis				0.000
N0	111	74 (66.7)	37 (33.3)
N1	125	55 (44.0)	70 (56.0)
TNM stage				0.002
I	101	68 (67.3)	33 (32.7)
II	83	37 (44.6)	46 (55.4)
III	32	18 (56.3)	14 (43.8)
IV	20	6 (30.0)	14 (70.0)

Tumor position was judged according to the esophageal tumor site segmentation criteria of the International Union for Cancer Control (1997 edition). Tumor stage was judged according to esophageal tumor tumor-node-metastasis staging criteria. TNM: Tumor, node, metastasis.