Patient work status by interval compared with baseline
| 6 mo | 12 mo | 24 mo | |
|---|---|---|---|
| Worse from baseline (95% confidence interval) | 2.1% (0.1%–11.3%) | 4.4% (0.5%–15.2%) | 7.1% (1.5%–19.5%) |
| No change or improved from baseline (95% confidence interval) | 97.9% (88.7%–100.0%) | 95.6% (84.9%–99.5%) | 92.9% (80.5%–98.5%) |