Table 1.

Participants in this study

	Smoking status
	Never n = 34	Former n = 25	SHS n = 54	HTPs n = 22	Cigarettes n = 48
Age (years) Median	31.5	55	36	33.5	36.5
(min–max)	(18–62)	(37–64)	(18–61)	(21–64)	(18–64)