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Table 2 A random sample of 200 hospitalized patients with an ICD10 diagnosis code of AMI

From: Positive predictive value of ICD-10 codes for acute myocardial infarction in Japan: a validation study at a single center

 

True AMI

No AMI

Total

N = 165

N = 35

N = 200

Age (SD) years

67.3 (12.6)

69.4 (9.0)

67.7 (12.0)

Male, N (%)

126 (76.4)

30 (85.7)

156 (78.0)

Year of admission, N (%)

 2009

61(37.0)

12 (34.3)

73 (36.5)

 2010

51 (30.9)

11 (31.4)

62 (31.0)

 2011

53 (32.1)

12 (34.3)

65 (32.5)

ICD10 codes in claims, N (%)a

 I21.0 Acute transmural myocardial infarction of anterior wall

58 (35.2)

1 (2.9)

59 (29.5)

 I21.1 Acute transmural myocardial infarction of inferior wall

45 (27.3)

0 (0)

45 (22.5)

 I21.2 Acute transmural myocardial infarction of other sites

18 (10.9)

0 (0)

18 (9.0)

 I21.3 Acute transmural myocardial infarction of unspecified site

1 (0.6)

0 (0)

1 (0.5)

 I21.4 Acute subendocardial myocardial infarction

0 (0)

1 (2.9)

1 (0.5)

 I21.9 Acute myocardial infarction, Unspecified

43 (26.1)

18 (51.4)

61 (30.5)

Procedures for AMI in claims, N (%)

131 (79.4)b

9 (25.7)b

140 (70.0)b

Percutaneous coronary intervention (PCI)

119 (72.1)

9 (25.7)

128 (64.0)

Thrombolytic therapy(TT)

3 (1.8)

1 (2.9)

4 (2.0)

Coronary artery bypass graft(CABG)

14 (8.5)

0 (0)

14 (7.0)

  1. ICD-10 International Classification of Diseases and Related Health Problems 10th Revision, AMI acute myocardial infarction, SD Standard Deviation
  2. aNo patient had the code for “Subsequent myocardial infarction” (I22)
  3. bThe number (%) of patients who had either PCI, TT or CABG