Table 2.
Descriptive Statistics for Each Performance Measure and Computation of the Standard for Minimally-Acceptable Performance
| Measure | Physician performance mean (SD)* | Threshold† | Points¶ | Threshold X points |
|---|---|---|---|---|
| Process measures ‡ | ||||
| Retinal exam | 0.63 (0.29) | 0.288 | 9 | 2.59 |
| Nephropathy assessment | 0.92 (0.12) | 0.731 | 10 | 7.31 |
| Foot exam | 0.69 (0.33) | 0.356 | 4 | 1.42 |
| Smoking status & cessation advice / treatment | 0.97 (0.07) | 0.675 | 7 | 4.73 |
| Intermediate Outcome Measures | ||||
| Not A1C poor control § | 0.84 (0.18) | 0.725 | 10 | 7.25 |
| A1C at goal ‖ | 0.61 (0.20) | 0.360 | 7 | 2.52 |
| Not blood pressure poor control § | 0.74 (0.16) | 0.537 | 10 | 5.37 |
| Blood pressure superior control | 0.39 (0.17) | 0.169 | 9 | 1.52 |
| Not LDL poor control § | 0.75 (0.19) | 0.587 | 10 | 5.87 |
| LDL superior control | 0.54 (0.20) | 0.238 | 8 | 1.91 |
| Patient Experience Measures ‖ | ||||
| Overall diabetes care satisfaction | 0.75 (0.16) | 0.463 | 7 | 3.24 |
| Patient self-care support | 0.79 (0.12) | 0.531 | 9 | 4.78 |
| Standard | Sum = 48.51 | |||
A1C, Hemoglobin A1C; LDL, Low-density Lipoprotein.
* The physician performance mean is the average proportion of patients meeting the measure across the sample of 957 physicians.
† Threshold is the minimally-acceptable performance rate determined by the panel via the standard-setting exercise.
‡ For all process measures, a physician must earn at least the threshold to be awarded any points.
§ For the Poor Control measures, points were awarded to physicians when their patients did not meet the performance level noted in Table 1. For example, if 80% of a physician’s patients did not have poor control of their blood pressure, then the physician would earn 8 points for that measure (0.80 × 10 = 8).
‖ See footnote under Table 1 for a description of the A1C at goal measure and the patient experience measures.
¶ Points were determined using the Dunn–Rankin method, which required panelists to independently rate each measure’s importance for delivering a minimally-acceptable level of diabetes care.