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. 2014 Dec 4;19(1):67. doi: 10.1186/s40001-014-0067-3

Table 1.

The descriptive statistics for the demographic and clinical characteristics of all participants

	N-SCLC (n = 110)	Controls (n = 100)	P value
Mean age ± SD (Age range)	60.18 ± 8.64	59.23 ± 11.12	0.493
Sex
Female (%)	16 (14.55)	13 (13.00)	-
Male (%)	94 (85.45)	87 (87.00)	0.746
Smoking history^a
Mean pack-years ± SD	50.38 ± 20.25	48.02 ± 20.76	0.405
Performance status^b
0 to 1 (%)	83 (75.45)	-	-
2 to 4 (%)	27 (24.55)	-	-

N-SCLC, non-small cell lung cancer; SD, standard deviation.

^aSmoking history in pack-years.

^bEastern Cooperative Oncology Group performance status.