Table 1. Demographic characteristics of participants.

	Number (%)
	Total	Male	Female	P-valuea
Characteristics	217	95 (43.8)	122 (56.2)
Age, years				0.61T
Mean	73	72.7	73.2
Range	50–89	50–89	51–89
Age group				0.57C
50–59	5 (2.3)	2 (2.1)	3 (2.5)
60–69	58 (26.9)	26 (27.4)	32 (26.5)
70–79	120 (51.6)	49 (51.6)	71 (58.7)
≥80	33 (15.3)	18 (19.0)	15 (12.4)
Unknown	1		1
Smoking status				<0.001C
Unknown	9 (4.2)	4 (4.2)	5 (4.1)
Non-smoking	158 (72.8)	42 (44.2)	116 (95.1)
Smoker	50 (23.0)	49 (51.6)	1 (0.8)
Years smoked
Mean	22.1
Range	1–67
≤5	12
>6–19	13
≥20	22
Unknown	3

^aT, independent samples t-test; C, χ² test.