Table 1.
Baseline characteristics of the included subjects in the overall cohort and in the propensity score matched cohort
| Men | Women | P value | |
|---|---|---|---|
| Overall cohort, n | 522 | 2357 | |
| Age (years), mean ± SD | 47.8 ± 13.2 | 46.3 ± 12.1 | 0.024 |
| Medication overuse, n (%) | 366 (70.1) | 1686 (71.5) | 0.385 |
| Baseline headache days, mean ± SD | 23.8 ± 6.3 | 23.8 ± 5.9 | 0.900 |
| CM duration (years), mean ± SD | 8.5 ± 9.0 | 7.9 ± 7.8 | 0.209 |
| Acute medication days (number), mean ± SD | 18.8 ± 9.7 | 19.5 ± 8.9 | 0.157 |
| Propensity score matched cohort, n | 121 | 170 | |
| Age (years), mean ± SD | 45.2 ± 10.9 | 44.9 ± 11.1 | 0.822 |
| Medication overuse, n (%) | 85 (70.2) | 121 (71.2) | 0.912 |
| Baseline headache days, mean ± SD | 27.1 ± 5.0 | 27.2 ± 4.9 | 0.794 |
| CM duration (years), mean ± SD | 6.1 ± 5.7 | 6.2 ± 5.5 | 0.916 |
| Acute medication days (number), mean ± SD | 20.5 ± 10.8 | 20.7 ± 10.4 | 0.884 |
CM indicates chronic migraine, SD standard deviation