Table 2.
Sensitivity, positive predictive value, and proportion of patients classified as having diabetes and hypertension by different methods, using matched patient-level data in a mid-size health system (Database A) to those systems patients in the Health Information Exchange (Database B), Utah — 2015 (N = 72,356)
| Variables | Sensitivitya | Positive Predictive Valuea | Proportion Classified in Database A | Proportion Classified in Database B | Absolute Difference | Percent Difference |
|---|---|---|---|---|---|---|
| % | % | % | % | % | % | |
| Classified as having Diabetes based on: | ||||||
| A1C Test Resultsb | 22.9 | 36.0 | 1.2 | 0.8 | 0.4 | 40.0 |
| Diagnosis Codes | 52.8 | 76.9 | 11.6 | 8.0 | 3.6 | 36.7 |
| Bothc | 55.7 | 77.8 | 11.6 | 8.3 | 3.3 | 33.2 |
| Classified as having Hypertension based on: | ||||||
| Blood Pressure Readingsb | 16.5 | 54.4 | 3.0 | 0.9 | 2.1 | 107.7 |
| Diagnosis Codes | 57.4 | 70.6 | 20.7 | 16.8 | 3.9 | 20.8 |
| Bothc | 57.1 | 71.4 | 21.5 | 17.2 | 4.3 | 22.2 |
aUsing Database A as the standard
bOnly captures persons with either uncontrolled diabetes or uncontrolled hypertension
cUsed as measure of disease prevalence