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Mean copayments of medications by change in tier in the year before and after VBF implementation
| Change in Tier | Number of unique medicationsa, n (%) | Number of prescription claims year before, n (%) | Pre-VBF Copay, mean (SD) | Post-VBF Copay, mean (SD) | Diff, mean (SD) |
|---|---|---|---|---|---|
| No Change in tier | 1,207 (73) | 41,193 (68) | 18 (15) | 27 (19) | 8 (6) |
| Moved into lower tier | 325 (20) | 16,871 (28) | 14 (11) | 7 (13) | −7 (6) |
| Moved into higher tier | 122 (7) | 2,288 (4) | 40 (17) | 79 (23) | 39 (22) |
