Table 3. Annualized Relapse Rate by Country.
| Observation period | Relapse count | Follow-up years | Annualized relapse rate (95% CI) | P value |
|---|---|---|---|---|
| All | ||||
| Denmark | 1828 | 9605.4 | 0.190 (0.182-0.199) | <.001 |
| Sweden | 739 | 9521.6 | 0.078 (0.072-0.083) | |
| Early (2013-2014 DMT initiated) | ||||
| Denmark | 1099 | 5878.2 | 0.187 (0.176-0.198) | <.001 |
| Sweden | 481 | 5865.3 | 0.082 (0.075-0.090) | |
| Late (2015-2016 DMT initiated) | ||||
| Denmark | 729 | 3727.2 | 0.196 (0.182-0.210) | <.001 |
| Sweden | 258 | 3656.3 | 0.071 (0.062-0.080) | |
Abbreviation: DMT, disease-modifying treatment.