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Table 8 Discharge diagnoses for patients referred to acute hospital admission with the diagnosis acute myocardial infarction (K75). Relative risk for different discharge ICD-10 diagnoses by explanatory variables (referrals, age and gender), compared with discharged with acute myocardial infarction (I21)

From: Reasons for acute referrals to hospital from general practitioners and out-of-hours doctors in Norway: a registry-based observational study

Discharge ICD-10 diagnoses

All

OOH referrals

Age

Gender (F)

N

%

%a

RRc

95% CI

Median (IQR)

RRc

95% CI

%b

RRc

95% CI

Acute myocardial infarction (I21)

583

43

63

  

66 (56–76)

  

25

  

Pain in throat and chest (R07)d

160

12

54

0.71

0.54–0.93

62 (53–74)

0.79

0.71–0.87

36

1.81

1.35–2.42

Angina pectoris (I20)

93

7

40

0.47

0.32–0.69

72 (64–81)

1.21

1.04–1.41

27

0.87

0.56–1.34

Chronic ischaemic heart disease (I25)

60

4

47

0.47

0.29–0.77

61 (54–67)

0.74

0.61–0.90

15

0.68

0.34–1.37

Atrial fibrillation and flutter (I48)

49

4

51

0.73

0.43–1.23

76 (69–82)

1.51

1.21–1.89

43

1.37

0.78–2.41

Heart failure (I50)

41

3

66

1.30

0.71–2.35

81 (73–88)

1.96

1.51–2.55

51

1.50

0.81–2.75

Other diagnoses chapter I (circulatory)

121

9

62

0.99

0.71–1.38

71 (57–81)

1.05

0.93–1.20

37

1.48

1.04–2.11

Other diagnoses chapter R (symptoms)

63

5

60

0.95

0.59–1.52

71 (60–82)

1.09

0.90–1.31

43

1.85

1.12–3.06

Diagnoses chapter J (respiratory)

62

5

55

0.83

0.52–1.32

77 (69–83)

1.52

1.25–1.85

39

1.16

0.70–1.91

Other

127

9

42

0.52

0.38–0.72

70 (59–83)

1.03

0.91–1.16

46

1.94

1.40–2.68

All

1359

100

57

  

68 (57–79)

  

32

  
  1. Legend: Distribution of discharge diagnoses for patients referred to acute hospital admission by general practitioner (GP) and out-of-hours (OOH) doctor with the ICPC-2 referral code acute myocardial infarction (K75) in Norway 2017
  2. IQR Interquartile range
  3. aPercent of OOH doctor in referrals with myocardial infarction (K75) diagnosis and the current ICD-10 discharge diagnosis
  4. bPercent of women in referrals with myocardial infarction (K75) diagnosis and the current ICD-10 discharge diagnosis
  5. cRelative risk for the different ICD-10 discharge diagnoses for OOH referrals relative to GP referrals, for a 10-years increase in age, and for female patients relative to male patients compared with discharge with acute myocardial infarction (I21)
  6. dPoisson regression was used to estimate RR