Table 1. A comparison of the population characteristics between the origins of the cancerous and non-cancerous resected tumors, mean (± standard deviation), median [limits] or number of subjects.

	Cancer group n = 127	Non-Cancer group n = 29	p
Mean age, years	61.84 (11.15)	57.75 (11.87)	0.107
Gender			0.697
Male, n	72	17
Female, n	55	12
Tobacco (pack years) Median	35 [0–120]	30 [0–110]	0.299
Sample weight (g)
Mean	0.076 (0.11)	0.072 (0.093)	0.851
Pre-operative suspicion of cancer (n)			0.017
Certain	56	8
Probable	57	10
Possible	14	10