Table 2. Changes in Spending in Treatment and Control Groups ($ per enrollee per quarter).
| Treatment Enrollees (AQC) (N=428,892) |
Control Enrollees (Non-AQC) (N=1,339,798) |
Between-Group Difference | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Category | Pre- AQC |
Post- AQC |
Change | Pre AQC |
Post AQC |
Change | Average 2-year effect | Year-1 effect | Year-2 effect | ||||
| Unadj. | Adj. | P | P | P | |||||||||
| Colonoscopy | |||||||||||||
| All enrollees | 9.42 | 11.64 | 2.22 | 9.39 | 10.65 | 1.26 | 0.96 | 0.54 | 0.16 | 0.55 | 0.005 | 0.56 | 0.22 |
| Over 50 yrs | 27.75 | 31.73 | 3.98 | 25.39 | 27.78 | 2.39 | 1.59 | 1.37 | 0.24 | 1.58 | 0.01 | 1.24 | 0.38 |
| Cardiovascular | 20.03 | 22.17 | 2.14 | 22.40 | 25.40 | 3.00 | −0.86 | −1.47 | 0.02 | −1.37 | 0.001 | −1.54 | 0.04 |
| Imaging | 93.10 | 106.54 | 13.44 | 102.31 | 118.80 | 16.49 | −3.05 | −5.67 | 0.001 | −4.40 | <0.001 | −6.86 | 0.001 |
| Orthopedics | 4.12 | 5.68 | 1.56 | 4.88 | 6.30 | 1.42 | 0.14 | 0.04 | 0.83 | −0.01 | 0.95 | 0.07 | 0.77 |