Table 1.

Baseline characteristics

	Study cohort				Matched cohort
	All	Prolonged PR	Normal PR	Short PR	Prolonged PR	Normal PR
		>200 ms	120–200 ms	<120 ms	>200 ms	120–200 ms
All	(n=1 06 124)	(n=9397)	(n=92 565)	(n=4162)	(n=8238)	(n=24 714)
Male sex	51 156 (48.2%)	5558 (59.1%)	44 029 (47.6%)	1569 (37.7%)	4569 (55.5%)	13 710 (55.5%)
Age, median (IQR)	61 (43–74)	75 (63–84)	59 (43–73)	52 (34–69)	72 (61–81)	72 (60–81)
18–50	36 748 (34.6%)	1157 (12.3%)	33 592 (36.3%)	1999 (48.0%)	1157 (14.0%)	3494 (14.1%)
51–69	34 165 (32.2%)	2373 (25.3%)	30 621 (33.1%)	1171 (28.1%)	2371 (28.8%)	7250 (29.3%)
70+	35 211 (33.2%)	5867 (62.4%)	28 352 (30.6%)	992 (23.8%)	4710 (57.2%)	13 970 (56.5%)
Charlson
0	74 396 (70.1%)	5785 (61.6%)	65 693 (71.0%)	2918 (70.1%)	5186 (63.0%)	15 667 (63.4%)
1	13 750 (13.0%)	1309 (13.9%)	11 866 (12.8%)	575 (13.8%)	1154 (14.0%)	3415 (13.8%)
2	11 239 (10.6%)	1494 (15.9%)	9366 (10.1%)	379 (9.1%)	1196 (14.5%)	3591 (14.5%)
3+	6739 (6.4%)	809 (8.6%)	5640 (6.1%)	290 (7.0%)	702 (8.5%)	2041 (8.3%)
Other diagnoses
Heart failure	4473 (4.2%)	950 (10.1%)	3356 (3.6%)	167 (4.0%)	509 (6.2%)	1640 (6.6%)
MI	4933 (4.6%)	913 (9.7%)	3881 (4.2%)	139 (3.3%)	590 (7.2%)	1870 (7.6%)
Use of medication
QT-prolong drugs	18 560 (17.5%)	2886 (30.7%)	15 191 (16.4%)	483 (11.6%)	2195 (26.6%)	6750 (27.3%)
Centre
Odense	13 572 (12.8%)	1146 (12.2%)	11 884 (12.8%)	542 (13.0%)	980 (11.9%)	2940 (11.9%)
South West Jutland	9905 (9.3%)	932 (9.9%)	8683 (9.4%)	290 (7.0%)	815 (9.9%)	2445 (9.9%)
Skåne	43 616 (41.1%)	3960 (42.1%)	37 757 (40.8%)	1899 (45.6%)	3376 (41.0%)	10 128 (41.0%)
Helsingborg	39 031 (36.8%)	3359 (35.7%)	34 241 (37.0%)	1431 (34.4%)	3067 (37.2%)	9201 (37.2%)
ECG HR, median (IQR)	76 (66–89)	71 (62–83)	76 (66–90)	85 (70–103)	71 (62–83)	77 (66–90)

Baseline characteristics of the study cohort and the propensity score matched cohort.

PR, PR interval.