Table 3.

Mean survival time in patients with single lung cancer and LCF.

Characteristics		Single Lung Cancer (n = 61,642)	LCF (n = 3728)	p
Mean (std)
Stage of lung cancer	0	4.33 (1.37)	4.37 (2.06)	0.8407
	1	4.82 (2.01)	4.76 (1.98)	0.3277
	2	3.50 (2.40)	4.07 (2.39)	0.0002
	3	2.22 (2.14)	2.96 (2.27)	<0.001
	4	1.35 (1.55)	1.80 (1.78)	<0.001
Hx of smoking	Yes	1.75 (2.01)	2.791 (2.33)	<0.001
	No	2.79 (2.32)	3.88 (2.32)	<0.001
	Unknown	1.73 (1.98)	2.42 (2.23)	<0.001
Hx of alcohol drinking	Yes	1.93 (2.12)	3.06 (2.43)	<0.001
	No	2.42 (2.27)	3.57 (2.37)	<0.001
	Unknown	1.73 (1.98)	2.42 (2.23)	<0.001
EGFR	Mutant	2.58 (1.96)	3.51 (1.97)	<0.001
	Not detected	1.77 (1.91)	2.78 (2.20)	<0.001
	Unknown	2.20 (2.37)	3.24 (2.50)	<0.001
Histological type of lung cancer	AC	2.63 (2.26)	3.77 (2.29)	<0.001
	SCC	1.56 (1.90)	2.57 (2.34)	<0.001
	Small cell	0.96 (1.35)	1.47 (1.67)	<0.001
	Others	1.56 (2.22)	2.46 (2.41)	<0.001

AC: adenocarcinoma; Hx, history; LCF, lung cancer first; SCC: squamous cell carcinoma.