Introduction
Methods
Study design and data source
Outcomes of interest
Covariates
Statistical analysis
Results
Dental ED visits and states’ characteristics by Medicaid expansion status
Non-expansion States (N = 12) | Expansion States (N = 11) |
P
| |
---|---|---|---|
Total number of dental ED visits | 1,221,300 | 777,600 | |
Total quarterly visits, state average | 4626.1 (3976.7) | 3213.2 (2588.2) | < 0.001 |
Total quarterly visits per 100,000, state average | 129.5 (62.1) | 104.5 (36.6) | < 0.001 |
Share of dental ED visits by payer source (%) | |||
Medicaid | 31.2 (11.5) | 43.1 (15.4) | < 0.001 |
Uninsured | 48.6 (12.6) | 36.2 (15.8) | < 0.001 |
Private insurance | 20.2 (11.6) | 20.7 (7.0) | 0.572 |
Population / State-level characteristics | |||
Female (%) | 48.9 | 49.1 | 0.040 |
Race/Ethnicity (%) | |||
Non-Hispanic whites | 74.7 | 70.8 | 0.001 |
Non-Hispanic blacks | 11.8 | 8.7 | < 0.001 |
Hispanic | 8.3 | 12.9 | < 0.001 |
Age group 35 to 64 years of age | 39.5 | 40.8 | < 0.001 |
Uninsured share of non-elderly population (%) | 19.7 | 15.0 | < 0.001 |
Unemployment rate | 6.8 | 7.3 | 0.012 |
Population shares by poverty level (%) | |||
0–100% pf FPL | 15.3 | 13.6 | < 0.001 |
100–200% of FPL | 19.9 | 17.1 | < 0.001 |
Number of hospitals per 100,000 population | 4.5 | 2.8 | < 0.001 |
Number of dentists per 100,000 population | 52.2 | 62.5 | < 0.001 |
Number of states that offer adult dental benefits in Medicaid | 5 | 9 | |
State population of non-elderly adults with Medicaid, private, or no health insurance (millions), average | 3.4 | 3.5 | 0.718 |
Difference-in-differences analyses
Dental ED visits, per quarter | Pre-expansion period | Post-expansion period | Difference | Unadjusted DiD | Adjusted DiD (95% CI) | |
---|---|---|---|---|---|---|
Total per 100,000
| -7.9 | -10.9 (-18.5 − -3.4) | ||||
Non-expansion States | 127.9 | 132.9 | 5.0 | |||
Expansion States | 105.4 | 102.5 | -2.9 | |||
Medicaid share
| 19.2 | 15.9 (11.3–20.5) | ||||
Non-expansion States | 31.3 | 30.9 | -0.4 | |||
Expansion States | 37.1 | 55.9 | 18.8 | |||
Uninsured share
| -15.5 | -10.9 (-16.6 − -5.2) | ||||
Non-expansion States | 49.6 | 46.2 | -3.4 | |||
Expansion States | 42.2 | 23.3 | -18.9 | |||
Private insurance share
| -3.6 | -5.0 (-8.6 – -1.4) | ||||
Non-expansion States | 19.0 | 22.9 | 3.9 | |||
Expansion States | 20.6 | 20.9 | 0.3 | |||
Medicaid dental benefits generosity
| ||||||
Non-expansion States | -3.2 | 6.3 (-22.3–34.9) | ||||
Emergency-only or none | 155.5 | 161.8 | 6.3 | |||
More than emergency | 89.3 | 92.4 | 3.1 | |||
Expansion States | -7.2 | -11.4 (-17.9 – -4.9) | ||||
Emergency-only or none | 78.0 | 81.0 | 3.0 | |||
More than emergency | 111.5 | 107.3 | -4.2 |