Table 1.

Demographic characteristics of cases and controls at the index date

	Controls (n=182 600)		Cases (n=1826)
Characteristics	n	%	n	%
Male sex	1 07900	59.09	1079	59.09
Age (years)
<45	26 100	14.29	261	14.29
45–54	45 700	25.03	457	25.03
55–64	71 100	38.94	711	38.94
65–74	39 700	21.74	397	21.74
Socioeconomic status*
Academics and managers	19 916	10.91	213	11.66
High salary positions	25 302	13.86	251	13.75
Low salary positions	32 480	17.79	336	18.40
Skilled workers	54 929	30.08	522	28.59
Unskilled workers	28 294	15.50	281	15.39
Unknown	21 679	11.87	223	12.21
Residence at diagnosis/index date
Copenhagen	18 693	10.24	199	10.90
Copenhagen suburbs	42 762	23.42	414	22.67
Aarhus/Odense	18 026	9.87	167	9.15
Provincial towns	74 182	40.63	779	42.66
Rural areas	27 443	15.03	249	13.64
Greenland	594	0.33	8	0.44
Unknown	900	0.49	10	0.55
Marital status
Married	1 20649	66.07	1206	66.05
Unmarried	27 308	14.96	267	14.62
Divorced	25 683	14.07	266	14.57
Widowed	8959	4.76	87	4.91
Unknown	1	0.00	0	0.00

^*Where a spouse′s job title was available, socioeconomic status is based on the highest status of the study participant or his/her spouse.