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Table 1 Overview of the AMI and background population in the six time periods

From: Geographical inequalities in the decreasing 28-day mortality following incident acute myocardial infarction: a Danish register-based cohort study, 1987–2016

 

Period

1987–1991

1992–1996

1997–2001

2002–2006

2007–2011

2012–2016

AMI population

 Individuals with incident AMI (N)

85,146

69,906

58,408

59,454

50,601

45,324

 Deaths within 28 days (N)*

39,518

29,236

20,592

17,342

13,163

9,106

 28-day mortality (%)

46.4

41.8

35.3

29.2

26.0

20.1

 AMI age (mean (sd))

70.6 (12.7)

70.8 (13.0)

70.5 (13.6)

70.6 (14.0)

70.3 (14.2)

69.3 (13.9)

 Men (%)

60.8

59.4

59.2

59.6

60.7

63.0

Background population

 Cohabitation (%)

44.0

43.2

43.0

42.8

42.5

41.4

 Low education (%)

48.4

45.0

41.1

38.2

36.4

34.0

 Unemployment (%)

3.6

4.6

2.3

2.4

1.1

1.3

 Low income (%)

30.6

30.1

30.0

30.2

30.3

31.0

  1. AMI age is the average age of individuals with incident AMI. The characteristics of the background population were calculated as the mean value across the 94 municipalities in the time period
  2. AMI acute myocardial infarction, sd standard deviation
  3. *Deaths within 28 days is the number of individuals with an incident AMI who died at any time between the day of AMI and 28 days after discharge from the hospital