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Table 2 Prevalence of diabetes in coronary heart disease patients from medical records and hospital discharge data, stratified by lookback period

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

 

Whole sample

Indigenous people*

 

ICD-9, n (%)

ICD-10, n (%)

ICD-10, n (%)

(n = 1685)

(n = 2258)

(n = 525)

Lookback period

Medical records

Hospital discharge data

Medical records

Hospital discharge data

Medical records

Hospital discharge data

Index admission

380 (22.5)

363 (21.5) ‡

789 (34.9)

670 (29.7) ‡

295 (56.2)

256 (48.8) ‡

1 year

 

373 (22.1)

 

721 (31.9) ‡

 

274 (52.2) ‡

2 years

 

377 (22.4)

 

737 (32.6) ‡

 

280 (53.3) ‡

5 years

 

381 (22.6)

 

765 (33.9) ‡

 

290 (55.2) ‡

10 years

 

383 (22.7)

 

772 (34.2) ‡

 

294 (56.0)

15 years

 

385 (22.8)†

 

773 (34.2) ‡

 

294 (56.0)

  1. *Indigenous patient sample from the ICD-10 sample only.
  2. P-values are comparing prevalence from medical records with hospital discharge data, separately for ICD-9, ICD-10, and Indigenous sample. †p < 0.05; ‡p < 0.0001.
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BMC Medical Research Methodology

ISSN: 1471-2288

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