Demographic characteristics and comorbidities in patients with and without FM
| Variable | FM | P value | |
| No | Yes | ||
| n=132 863 | n=33 216 | ||
| Sex | n (%) | n (%) | 0.99 |
| Female | 71 880 (54.1) | 17 970 (54.1) | |
| Male | 60 983 (45.9) | 15 246 (45.9) | |
| Age, mean (SD) | 50.9 (16.9) | 51.4 (16.7) | <0.001* |
| Stratify age | 0.99 | ||
| ≤49 | 64 292 (48.4) | 10 673 (48.4) | |
| 50–65 | 36 820 (27.7) | 9205 (27.7) | |
| 65+ | 31 751 (23.9) | 7938 (23.9) | |
| Comorbidity | |||
| Diabetes | 10 485 (7.89) | 3193 (9.61) | <0.001 |
| Hypertension | 37 284 (28.1) | 11 287 (34.0) | <0.001 |
| Hyperlipidaemia | 22 446 (16.9) | 7301 (22.0) | <0.001 |
| Depression | 4690 (3.53) | 1804 (5.43) | <0.001 |
| Anxiety | 10 494 (7.90) | 4214 (12.7) | <0.001 |
| Sleep disorder | 21 095 (15.9) | 8121 (24.5) | <0.001 |
| CAD | 17 918 (13.5) | 5821 (17.5) | <0.001 |
| CFS | 199 (0.15) | 93 (0.28) | <0.001 |
| IBS | 5125 (3.86) | 1870 (5.63) | <0.001 |
Χ2 test; *two-sample t-test.
CAD, coronary artery disease; CFS, chronic fatigue syndrome; FM, fibromyalgia; IBS, irritable bowel syndrome.