Table 3.
Changes in payments associated with ACO enrollment, pre-post difference-in-differences (DID) analysis
| Risk-adjusted average payment ($) | Pre-post analysis, change in payment ($) | DID analysis, change in payment ($) | |||||
|---|---|---|---|---|---|---|---|
| ACO | Non-ACO | ACO | Non-ACO | ||||
| Before enrollment | After enrollment | Before enrollment | After enrollment | After vs. before enrollment | After vs. before enrollment | ||
| Total payment | 23447 (23182 to 23712) |
23451 (23194 to 23708) |
23337 (23193 to 23480) |
23413 (23267 to 23559) |
4 (−155 to 164) |
76 (−30 to 182) |
−72 (−228 to 84) |
| Index hospitalization | 15043 (14917 to 15169) |
15113 (15001 to 15225) |
15065 (14993 to 15137) | 15134 (15062 to 15206) |
69 (−20 to 159) |
69 (1 to 137) |
1 (−88 to 89) |
| Readmissions | 9385 (9184 to 9585) |
9285 (9063 to 9508) |
9274 (9153 to 9396) |
9457 (9315 to 9600) |
−99 (−416 to 217) |
183 (−21 to 387) |
−282 (−588 to 23) |
| Physician services | 3233 (3183 to 3283) |
3223 (3173 to 3272) |
3238 (3213 to 3263) |
3208 (3181 to 3234) |
−10 (−34 to 14) |
−30 (−46 to −14) |
20 (−5 to 45) |
| Post-acute care | 6262 (6083 to 6442) |
6269 (6086 to 6452) |
6188 (6088 to 6288) |
6256 (6154 to 6358) |
7 (−93 to 107) |
68 (1 to 135) |
−61 (−160 to 38) |
95% confidence intervals given in parentheses.