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Table 3 Sources of discordance for diagnoses detected by case finding algorithms but not chart review

From: From patient care to research: a validation study examining the factors contributing to data quality in a primary care electronic medical record database

Category Specific factor COPD Depression DM HTN OA Total
n (%) n (%) n (%) n (%) n (%) n (%)
ICD-9 codes present without diagnosis 24(77) 6(46) 8(89) 19(86) 7(100) 64(78)
Used for unrelated visit 1(3) 3(23) 5(56) 12(55) 2(29) 23(28)
Used for visit for a related condition 3(10) - 1(11) 3(14) 1(14) 8(10)
Used for visits with queried unconfirmed diagnosis 1(3) 3(23) 2(22) 4(18) 4(57) 14(17)
Inappropriate COPD codes at single site 19(61) - - - - 19(23)
Medications/Lab       
Medications prescribed for other indications 8(26) 7(54) - 3(14) - 18(22)
Aberrant Labs - - 1(11) - - 1(1)
Total Discordant Cases (Chart -/CPCSSN +)* 31(100) 13(100) 9(100) 22(100) 7(100) 82(100)
  1. COPD: Chronic Obstructive Pulmonary Disease; DM: Diabetes Mellitus; HTN: Hypertension; OA: Osteoarthritis.
  2. *Total is greater than row values due to multiple factors contributing to discordance.