Participant demographics
| Control group | Symptomatic group | ||
| Body mass index | Mean | 25.8 (min 19.5, max 33.0) | 25.5 (min 19.5, max 34.3) |
| SD | 4.8 | 4 | |
| Age | Mean | 39.6 (min 26, max 61) | 45.2 (min 5.2, max 69.0) |
| SD | 9.6 | 11.5 | |
| m:f | Number | 18:7 | 17:8 |
| Ratio | 39 | 47 |
f, female; m, male.