Table 2—

Facility level adherence: performance measures and QALYs gained by age category

Age (years)
25–3435–4445–5455–6465–7475–8485–94TotalFacility range
n1911,2025,9517,32512,4599,44357137,142
Performance measure
A1C <8.0%*464652586669696248–75
A1C <7.0%*292933354144473921–57
QALY maximum weights per patient (A1C <7.0%)0.64820.45750.25270.1270.05070.01420.00170.1043
Actual QALYsS0.2417 ± 0.290.1736 ± 0.210.1082 ± 0.120.0596 ± 0.060.0275 ± 0.020.0082 ± 0.0060.0010 ± 0.00080.0473 ± 0.083
Percent maximal QALYsS373843475458604531–60
• Data are means ± SD unless otherwise indicated.

• *

* For the categories of A1C <8% and <7%, the percent adherence by age-group was calculated by determining the percent of people in that age-group who had A1C levels under the threshold. The number presented is the weighted average across all facilities.

• Percent of maximal QALYs was a two-step calculation. In the first step, the maximal QALYs attainable by a facility was calculated by multiplying the number of people in each age category by the QALY weight assigned to that category. This assumes that all patients meet the best criteria. The second step calculates the actual QALYs attained by each facility. This is a function of whether a patient had an A1C test and his or her A1C test value. A1C <7.0%: QALY = QALY maximum weights (QMW). A1C >7.0% and <7.9%: QALY = QMW − [(A1C value − 7.0)/0.9] × QMW. A1C ≥7.9%: QALY = 0. The adherence (percent maximal QALYsS) is a percentage of actual to maximal QALYs. The higher this percentage, the better the levels of A1C testing and the better the A1C control among patients tested. The number presented is the weighted average adherence across all facilities.