Table 3. Detection rate of lung cancer patients according to the smoking status, gender, and age.

Smoking status (%)	Subgroup according to the gender and smoking status	Age group	Number of participants (%)	Number of lung cancer patients (%)	Detection rate by age group (%)	Subtotal of lung cancer patients (%)	Detection rate by subgroup of smoking status (%)	Detection rate by smoking status (never-smoker and smoker) (%)
Never-smoker, n=6,021 (49.7)	Never-smoker women (n=3,875)	40–49	754 (6.2)	5 (3.8)	0.7	50 (37.9)	1.3 (50/3,875)	Detection rate in never-smokers 1.1 (66/6,021)
		50–59	1,282 (10.6)	19 (14.4)	1.5
		60–69	1,518 (12.5)	23 (17.4)	1.5
		≥70	321 (2.6)	3 (2.3)	0.9
	Never-smoker men (n=2,146)	40–49	484 (4.0)	1 (0.8)	0.2	16 (12.1)	0.7 (16/2,146)
		50–59	672 (5.5)	3 (2.3)	0.4
		60–69	781 (6.4)	7 (5.3)	0.9
		≥70	209 (1.7)	5 (3.8)	2.6
Smoker, n=6,090 (50.3)	Women with <30 pack-years of smoking (n=796)	40–49	275 (2.3)	2 (1.5)	0.7	10 (7.6)	1.3 (10/796)	Detection rate in smokers 1.1 (66/6,090)†
		50–59	307 (2.5)	3 (2.3)	1.0
		60–69	183 (1.5)	2 (1.5)	1.1
		≥70	31 (0.3)	3 (2.3)	9.7
	Men with <30 pack-years of smoking (n=2,989)	40–49	662 (5.5)	0	0.0	21 (15.9)	0.7 (21/2,989)
		50–59	1,023 (8.4)	7 (5.3)	0.7
		60–69	1,054 (8.7)	8 (6.1)	0.8
		≥70	250 (2.1)	6 (4.5)	2.4
	Women ≥30 pack-years of smoking (n=149)	40–49	15 (0.1)	0	0.0	1† (0.8)	0.7 (1/149)†
		50–59	63 (0.5)	1† (0.8)	1.6
		60–69	57 (0.5)	0	0.0
		≥70	14 (0.12)	0	0.0
	Men with ≥30 pack-years of smoking (n=2,156)	40–49	126 (1.0)	1 (0.8)	0.8	34 (25.8)	1.6 (34/2,156)
		50–59	753 (6.2)	10 (7.6)	1.3
		60–69	1,027 (8.5)	20 (15.2)	1.9
		≥70	250 (2.1)	3 (2.3)	1.3
Unknown	Men with unknown smoking status (n=3)	40–49	1 (0.0)	0	0.0	0
		60–69	2 (0.0)	0	0.0
Total			12,114 (100.0)	132† (100.0)	1.1	132† (100.0)

^†, an interval case was excluded.