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. Author manuscript; available in PMC: 2019 Aug 1.
Published in final edited form as: Ann Surg. 2018 Oct;268(4):584–590. doi: 10.1097/SLA.0000000000002952

TABLE 3.

Impact of the Affordable Care Act on Rates of Surgery for Medicaid Patients

Expansion States Nonexpansion State
Surgery Pre Post Rate Change Pre Post Rate Change DID IRR P Value
Pancreatic 5.33 5.93 0.6 5.31 6.59 1.28 −0.67 0.89 0.63
Esophageal 2.94 4.00 1.06 4.81 4.76 −0.05 1.10 1.32 0.84
Lung 7.07 8.48 1.41 5.08 4.69 −0.40 1.81 1.30 0.01
Bladder 11.91 15.44 3.53 11.92 10.35 −1.58 5.10 1.49 0.07
Breast 24.51 21.37 −3.14 16.51 11.38 −5.12 1.98 1.25 0.02
Colorectal 25.53 28.39 2.85 27.43 24.44 −2.99 5.84 1.25 0.00
Prostate 32.78 29.23 −3.55 28.69 24.37 −4.32 0.77 1.05 0.69
Gastric 14.88 15.45 0.58 10.58 9.55 −1.03 1.61 1.15 0.50

Pre-ACA period is from 2010 to 2013; Post-ACA is 2014.

The rate is the observed resection rate per 1000 cancer admissions.

DID indicates difference-in-difference; IRR, incidence rate ratio.