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Table 1 Baseline characteristics at date of inclusion of adults ≥ 30 years with a residential address in Denmark 2011–2015 and characteristics of individuals with incident atrial fibrillation (AF) (including atrial flutter) on date of diagnosis (2011–2015). Incidence rate (IR) and 95% confidence interval (CI)

From: Geographical variation and clustering are found in atrial fibrillation beyond socioeconomic differences: a Danish cohort study, 1987–2015

 

Study population at baseline

Incidence of atrial fibrillation (2011–2015)

N = 3,736,883

%

N = 93,434

%

IR per 100,000 person-years

95% CI

Sex

 Men

1,814,936

48.6

50,135

53.7

616.8

611.5-622.3

 Women

1,921,947

51.4

43,299

46.3

495.8

491.1-500.4

Age

 30–59

2,553,879

68.3

11,966

12.8

111.1

109.1-113.1

 60–69

642,007

17.28

20,746

22.2

645.4

636.7-654.3

 70–79

349,286

9.4

28,466

30.5

1487.8

1470.6-1505.2

 ≥ 80

191,711

5.1

32,256

34.5

3346.3

3310.0-3383.0

Education

 ≤ 9 years

1,179,760

31.6

44,631

47.8

894.5

886.2-902.8

 10–12 years

1,672,527

44.86

35,107

37.6

452.5

447.8-457.2

 ≥ 13 years

884,596

23.7

13,696

14.7

333.0

327.5-338.6

Income

 Lowest

827,329

22.1

22,199

23.8

665.7

657.0-674.6

 Second lowest

749,959

20.1

21,418

22.9

637.7

629.2-646.3

 Middle

734,984

19.7

18,134

19.4

537.5

529.7-545.4

 Second highest

719,943

19.3

16,520

17.7

487.3

480.0-494.8

 Highest

704,668

18.9

15,163

16.2

445.3

438.3-452.5

Cohabitation

 Married or living with a partner

2,508,211

67.1

49,745

53.2

434.1

430.3-437.9

 Single

1,228,672

32.9

43,689

46.8

808.7

801.1-816.3

  1. N, number of persons
  2. IR, incidence rate
  3. CI, confidence interval