Table 1 Demographic data of 40 patients with myofascial temporomandibular disorders randomized to treatment with active substance (GRA) or control substance (CTR)
|  | GRA (n = 20) | CTR (n = 20) |
|---|---|---|
Sex | Â | Â |
 Female | 18 | 19 |
 Male | 2 | 1 |
Age | Â | Â |
 Mean (SD) | 38.3 (15.1) | 39.1 (16.1) |
 <20 | 1 | 1 |
 20-40 | 11 | 12 |
 >40 | 8 | 7 |
Ethnic origin | Â | Â |
 Scandinavia | 14 | 15 |
 Other European countries | 2 | 3 |
 Africa | 1 | 0 |
 Asia | 2 | 1 |
 South America | 1 | 1 |
Marital status | Â | Â |
 Never married | 8 | 6 |
 Married | 9 | 12 |
 Divorced | 3 | 2 |
Highest level of education | Â | Â |
 Elementary school | 2 | 0 |
 High school | 9 | 10 |
 College | 9 | 10 |