Clinical characteristics of the patients
| CM patient | Age | Sex | Years of CM | Fibromyalgia | Insomnia | Analgesic overuse |
| 1 | 27 | F | 0.25 | − | ||
| 2 | 21 | M | 0.86 | − | ||
| 3 | 25 | F | 2 | + | ||
| 4 | 28 | F | 2 | Aspirin, caffeine | ||
| 5 | 47 | F | 16 | + | Ergotamine, dipirone | |
| 6 | 16 | F | 4 | − | ||
| 7 | 34 | M | 20 | + | − | |
| 8 | 25 | F | 3 | + | + | Dipirone |
| 9 | 35 | F | 10 | + | Dipirone, aspirin, acetaminophen | |
| 10 | 23 | F | 5 | Dipirone | ||
| 11 | 37 | F | 6 | + | + | Dipirone, caffeine |
| 12 | 28 | F | 3 | + | Ergotamine, acetaminophen | |
| 13 | 38 | M | 20 | + | + | − |
| 14 | 46 | F | 20 | Dipirone | ||
| 15 | 26 | F | 1 | Dipirone, isomepthene | ||
| 16 | 44 | F | 30 | + | Dipirone, caffeine, aspirin | |
| 17 | 27 | F | 10 | Dipirone, isomepthene | ||
| Controls | ||||||
| 18 | 28 | F | − | − | − | − |
| 19 | 31 | F | − | − | − | − |
| 20 | 22 | M | − | − | − | − |
| 21 | 44 | F | − | − | − | − |
| 22 | 24 | F | − | − | − | − |
| 23 | 29 | F | − | − | − | − |
| 24 | 27 | F | − | − | − | − |
| 25 | 30 | F | − | − | − | − |
| 26 | 27 | M | − | − | − | − |