Table 1.

Patient demographics and clinical characteristics

Characteristic	No.		%
Gender
Male	155		76.4
Female	48		23.6
Age(years)
≤42	27		13.3
>42	176		86.7
Family history
Yes	47		23.2
No	156		76.8
Smoking behaviora
Yes	122		60.1
No	81		39.9
TNM stageb
I	44		21.7
II	23		11.3
III	73		36.0
IV	63		31.0
Histological type
Adenocarcinoma	129		63.6
Squamous cell carcinoma	65		32.0
Other	9		4.4
Size(cm)c
≤6.0	164		80.8
>6.0	39		19.2
Treatment
Surgery	47		23.2
Surgery and Radiotherapy/ Chemotherapy	65		32.0
Radiotherapy/Chemotherapy	69		34.0
Other	22		10.8
ALB(g/L)
≤37.6	26		12.8
>37.6	177		87.2
CRP(mg/L)
≤9.5	135		66.5
>9.5	68		33.5
WBC(10^9/L)
≤10.0	170		83.7
>10.0	33		16.3
Neutrophil(10^9/L)
≤7.5	175		86.2
>7.5	28		13.8
Lymphocyte(10^9/L)
≤1.8	80		39.4
>1.8	123		60.6
Platelet(10^9/L)
≤163	26		12.8
>163	177		87.2
NLR
≤4.30	177		87.2
>4.30	26		12.8
PLR
≤109.5	84		41.4
>109.5	119		58.6
PNI
≤48.1	39		19.2
>48.1	164		80.8

a: Cigarette smoking is defined as having at least 1 cigarette per day for at least 6 months²⁴.

b: TNM stage was classified according to the AJCC 7th TNM staging system.

c: The tumor maximum diameter.

Abbreviations: TNM: Pathological Tumour Node Metastasis stage; ALB: albumin; CRP: C-reactive protein; WBC: white blood cell; NLR: neutrophil/lymphocyte ratio; PLR: platelet/lymphocyte ratio; PNI: prognostic nutritional index.