Table 1.

Demographic characteristics of 400 patients with lung cancer.

Observation items	Features
Age	67.4 ± 15.2
Gender (male/female)	279/121
Cytological type (case)
Small cell	38
Adenocarcinoma	152
Squamous cell carcinoma	176
Other	34
TNM staging
IIIA	65
IIIB	131
IIIC	164
IV	40
Nosocomial infection (cases)
Infected	76
Noninfected	354