Table 4.
Difference-in-difference impacts of copayment charges on influenza vaccination coverage for adults, 2003 vs. 2012 BRFSS data.
| Statistic | All Adults Age 19–64 | All Adults Age 50–64 | Medicaid Enrolled Pregnant Women Age 19–64 | Medicaid Enrolled Parents Age 19–64 |
|---|---|---|---|---|
| (N = 299,344) | (N = 134,459) | (N = 813) | (N = 10,813) | |
| Impact on Influenza Vaccination | −0.006 | −0.011 | −0.062 | −0.014 |
| 95% CI | (−0.012, −0.001) | (−0.019, −0.002) | (−0.145, 0.022) | (−0.047, 0.018) |
| p-value | 0.014 | 0.014 | 0.146 | 0.383 |
| 2003 Vaccination Level (%) | 29.2 | 42.2 | 15.7 | 18.3 |
Notes: Influenza vaccination coverage levels are from the 2003 and 2012 BRFSS. State policy attributes are from previously published reports [11,12]. Each coefficient is from a separate regression for the indicated population and policy parameter. Each regression includes controls for state of residence and year.