Table 3.

Results from linear regression models examining impact of ACA on dental coverage and dental visits, NHIS 2010‐2015

	Dental coverage in last year			Dental visit in last year
	Coefficient	Cluster standard error	P‐value	Coefficient	Cluster Standard Error	P‐value
Post‐ACA * EHB Group	0.046*	0.018	0.013	0.027	0.015	0.071
EHB Group	−0.122***	0.012	0.000	−0.034**	0.009	0.001
Male	0.013	0.010	0.194	−0.007	0.009	0.438
Race (reference: white)
Black	0.05**	0.018	0.008	−0.002	0.010	0.891
Other	0.002	0.015	0.900	−0.018	0.015	0.228
Hispanic	−0.023	0.017	0.189	−0.048**	0.013	0.001
Health status (reference: Excellent health)
Very good health	0.003	0.010	0.758	−0.008	0.008	0.332
Good health or worse	0.002	0.016	0.924	−0.042*	0.016	0.012
Well medical visit in past 12 months	0.038**	0.014	0.010	0.114***	0.016	0.000
Limitation of activity	0.011	0.019	0.580	0.0203	0.016	0.216
Family income <300% FPL	−0.068***	0.012	0.000	−0.093***	0.008	0.000
State expanded Medicaid	−0.008	0.018	0.660	−0.011	0.016	0.494
Urban	0.006	0.020	0.775	0.011	0.011	0.320
Age in years	0.001	0.001	0.627	0.030***	0.001	0.000
Family size	−0.004	0.004	0.298	0.0123**	0.004	0.002
CHIP eligibility upper‐income limit	−0.00004	0.000	0.935	−0.00004	0.000	0.833
Dentists per 10 000 child population	−0.002***	0.001	0.000	0.0005	0.001	0.350
Intercept	0.331**	0.123	0.010	0.423***	0.069	0.000
Total observations	16 404			16 404
Adjusted R‐squared	0.0519			0.1565

Notes: Models included standard errors clustered at the state‐level, state fixed effects, year‐quarter dummy variables, and probability weights. The full regression results are available in the Supporting Information, exhibit 1. The first two quarters of 2014 are dropped. *P < 0.05, **P < 0.01, ***P < 0.001.

ACA, Affordable Care Act; CHIP, Children's Health Insurance Program; EHB, essential health benefits; FPL, federal poverty level; NHIS, National Health Interview Survey.