TABLE 2.

Distribution of baseline demographic characteristics and covariates for participants in the Netherlands Cohort Study included in the replication analyses (subcohort and lung cancer cases)

	Subcohort noncases		Cases
	N	%	N	%
Total	3609	100	2861	100
Sex
Women	1736	48	2413	84
Men	1873	52	448	16
Age at recruitment (years)
[55, 60)	1405	39	1051	37
[60, 65)	1250	35	1004	35
[65, 69]	954	26	806	28
Smoking status
Never	1357	38	198	7
Former	1325	37	886	31
Current	927	26	1777	62
Education
Primary school	979	27	866	30
Lower vocational school	783	22	663	23
Secondary, medium vocational school	1312	36	959	34
Higher vocational, University	535	15	373	13
BMI (kg/m 2 )
[14.5, 20)	127	4	99	3
[20, 23)	754	21	614	21
[23, 25)	1102	31	878	31
[25, 30)	1398	39	1150	40
[30, 35)	201	6	115	4
[35, 44.3]	27	0.7	5	0.2
Physical activity (nonoccupational, min/day)
[0, 30]	718	20	619	22
(30, 60]	1134	31	872	30
(60, 90]	788	22	544	19
(90, 424]	969	27	826	29
Diabetes
No	3490	97	2770	97
Yes	119	3	91	3
Family history of lung cancer
No	3256	91	2490	87
Yes	353	10	371	13

In smokers	Mean	SD	Mean	SD
Cigarettes per day	15.1	10.1	19.7	10.3
Smoking duration (years)	31.2	12.2	40.0	9.2