Table 1.

Demographic characteristics at the index date by lead exposure

	Lead unexposed (n=93 773)		Lead exposed <50% probability (n=39 877)		Lead exposed ≥50% probability (n=20 203)
Characteristic	n	%	n	%	n	%
Sex
Male	48 304	51.57	31 498	79.16	13 706	68.00
Female	45 362	48.43	8292	20.84	6451	32.00
Age (years)
<45	11 337	12.10	4862	12.22	2240	11.11
45–54	23 686	25.29	10 506	26.40	5224	25.92
55–64	37 838	40.40	16 416	41.26	8524	42.29
65–74	20 805	22.21	8006	20.12	4169	20.68
Socioeconomic status*
Academics and managers	12 894	13.77	3003	7.55	1616	8.02
High-salary positions	15 296	16.33	4664	11.721	2653	13.16
Low-salary positions	17 761	18.96	6441	16.19	3437	17.05
Skilled workers	25 454	27.18	14 979	37.65	7484	37.13
Unskilled workers	13 575	14.49	7070	17.77	3383	16.78
Unknown	8686	9.27	3633	9.13	1584	7.86
Residence at diagnosis/index date
Copenhagen	9606	10.26	3328	8.36	2337	11.59
Copenhagen suburbs	22 226	23.73	88581	22.26	6003	29.78
Aarhus/Odense	9166	9.79	3939	9.90	1965	9.75
Provincial towns	38 703	41.32	17 001	42.73	6913	34.30
Rural areas	13 664	14.59	6553	16.42	2840	14.09
Greenland	81	0.09	31	0.08	26	0.13
Unknown	220	0.23	100	0.25	73	0.36
Marital status
Married	64 619	68.99	26 123	65.65	12 961	64.30
Unmarried	11 755	12.55	5805	14.59	2565	12.73
Divorced	12 193	13.02	6281	15.79	3703	18.37
Widowed	4918	5.25	1539	3.87	897	4.45
Unknown	181	0.19	42	0.11	31	0.15

^*SES for married subjects was based on the highest SES of the participant or spouse.