Table 1.

Comparison among smokers, ex-smokers, and never-smokers

	Smokers	Ex-smokers	Never smokers	p Valuea
	(n = 86)	(n = 135)	(n = 102)
	n (%)	n (%)	n (%)
Mean age at operation (years)	52.0 ± 8.9	55.7 ± 8.0	55.5 ± 10.7	0.002*
Mean BMI (kg/m²)	25.0 ± 5.0	25.5 ± 4.7	25.7 ± 4.2	0.15
Education
Low	36 (42.9)	36 (27.3)	40 (40)	0.059
Middle	38 (45.2)	72 (54.5)	40 (40)
High	10 (11.9)	24 (18.2)	20 (40)
No information	2	3	2
Monthly sun bed use	17 (19.8)	36 (26.9)	28 (27.5)	0.41
No information	0	1	0

*Significant p-value

^a p = 0.0007 for smokers compared with ex-smokers; p = 0.006 for smokers compared with never-smokers; p = 0.83 for ex-smokers compared with never-smokers