Table 4.
Risk-adjusted rates of surgery pre and post-ACA by insurance type
| Pre | Post | ∆ in Rate | DID | IRR* | P value | |
|---|---|---|---|---|---|---|
|
| ||||||
| Medicaid Insurance | ||||||
| Expansion | 15.00 | 17.96 | 2.96 | 4.15 | 1.80 | 0.001 |
| Non-expansion | 14.79 | 13.60 | −1.20 | |||
| Private Insurance | ||||||
| Expansion | 25.22 | 26.11 | 0.89 | 1.18 | 0.96 | 0.14 |
| Non-expansion | 25.48 | 25.20 | −0.29 | |||
| Self-Pay | ||||||
| Expansion | 13.68 | 12.47 | −1.21 | 0.00 | 0.67 | 0.001 |
| Non-expansion | 14.10 | 12.89 | −1.21 | |||
Adjusted for age, gender, race, and comorbidities. Pre-ACA period is from 2010 to 2013; Post-ACA is 2014. Difference in difference (DID); incidence rate ratio (IRR). Rate is per every 100 admissions.