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Table 1 Characteristics of the study sample

From: Concordance between administrative health data and medical records for diabetes status in coronary heart disease patients: a retrospective linked data study

 

ICD-9

ICD-10

Whole sample

(n = 1685)

(n = 2258)

(n = 3943)

Mean age, years (SD)

64.1 (10.8)

61.1 (12.3)

62.4 (11.8)

Males

1154 (68.5)

1530 (67.8)

2684 (68.1)

Indigenous people

25 (1.5)

525 (23.2)

550 (13.9)

Principal diagnosis

   

MI

860 (51.0)

1061 (47.0)

1921 (48.7)

UA

737 (43.7)

1052 (46.6)

1789 (45.4)

Other CHD

88 (5.2)

145 (6.4)

233 (5.9)

Length of stay, days

   

1-2

284 (16.8)

635 (28.1)

919 (23.3)

3-5

714 (42.4)

1011 (44.8)

1725 (43.8)

≥6

687 (40.8)

612 (27.1)

1299 (32.9)

Charlson index

   

0

777 (46.1)

1163 (51.5)

1940 (49.2)

1-4

807 (47.9)

963 (42.6)

1770 (44.9)

≥5

101 (6.0)

132 (5.8)

233 (5.9)

Comorbidities

   

0-3

507 (30.1)

1155 (51.1)

1662 (42.1)

4-7

868 (51.5)

862 (38.2)

1730 (43.9)

≥8

310 (18.4)

241 (10.7)

551 (14.0)

Hospital location, rural

22 (1.3)

741 (32.8)

763 (19.3)

Hospital type, private

434 (25.8)

386 (17.1)

820 (20.8)

Booked admission

224 (13.3)

198 (8.8)

422 (10.7)

  1. All figures shown as numbers (percentages) except where indicated. ICD, International Classification of Diseases; MI, myocardial infarction; UA, unstable angina; CHD, coronary heart disease.