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Table 2 Distribution of respondents offering answers consistent and inconsistent with medical records in their self-reports on diabetes and hypertension and the test of consistency

From: National health data linkage and the agreement between self-reports and medical records for middle-aged and older adults in Taiwan

  Self-reports
Diabetes Hypertension
Yes No Total Yes No Total
Medical records
(Gold Standard)
Yes 597 (82.5%) 127 (17.5%) 724 (100.0%) 1416 (84.1%) 267 (15.9%) 1683 (100.0%)
No 106 (3.7%) 2771 (96.3%) 2877 (100.0%) 320 (16.7%) 1598 (83.3%) 1918 (100.0%)
Sensitivity of self-report 82.5% 84.1%
Specificity of self-report 96.3% 83.3%
Overall consistency 93.5% 83.7%
The Kappa coefficient 0.80 (0.77–0.82) 0.67 (0.65–0.70)
  1. Self-reports: Do you have diabetes and/or hypertension?
  2. Medical records: Receiving outpatient medical treatment three times or more or being hospitalized once in 2011 for a specific disease. The ICD-9 Disease Codes of Diabetes and Hypertension were 250 and 401–405, respectively