Table 1.
Potential predictors of self-rated fibromyalgia onset by baseline muscle pain.
| Baseline | No marked muscle pain n = 136,423 | Marked muscle pain n = 7,481 | |||||
|---|---|---|---|---|---|---|---|
| No FM n = 135,738 | FM onset n = 685 | P value | No FM n = −7,200 | FM onset n = 281 | P value | Baseline FM n = 4,710 | |
| Females | 57.0% | 89.2% | <0.001 | 63.6% | 87.2% | <0.001 | 91.1% |
| Married/cohabiting | 80.5% | 81.9% | ns | 77.8% | 78.6% | ns | 81.4% |
| Off sick | 2.4% | 7.3% | <0.001 | 10.4% | 12.2% | ns | 13.1% |
| Low income | 15% | 20.5% | <0.001 | 21.2% | 24.8% | ns | 21.6% |
| Few years education | 27.9% | 38.2% | <0.001 | 37.9% | 41.9%% | ns | 43.6% |
| Allergies 4+ | 3.0% | 6.8% | <0.001 | 5.1% | 8.9% | 0.002 | 8.3% |
| Eczema | 15.2% | 19.9% | 0.001 | 16.8% | 20.6% | ns | 20.2% |
| Chronic sinusitis | 5.0% | 11.1% | <0.001 | 10.5% | 17.4% | p < 0.001 | 14.1% |
| Stomach ulcer | 2.3% | 3.9% | 0.004 | 5.2% | 6.8% | ns | 7.0% |
| Gallstones | 3.2% | 7.9% | <0.001 | 5.6% | 7.8% | ns | 9.6% |
| COPD/Bronchitis | 4.8% | 8.8% | <0.001 | 9.2% | 13.5% | 0.015 | 11.8% |
| Chronic cystitis | 1.6% | 5.7% | <0.001 | 4.1% | 6.0% | ns | 6.0% |
| GERD | 6.3% | 15.0% | <0.001 | 16.2% | 24.6% | p < 0.001 | 26.0% |
| Osteoarthritis | 6.3% | 18.4% | <0.001 | 16.7% | 24.6% | 0.001 | 23.8% |
| RA | 1.7% | 7.2% | <0.001 | 5.4% | 11.4% | p < 0.001 | 7.3% |
| IBS | 8.4% | 26.3% | <0.001 | 16.4% | 24.6% | p < 0.001 | 33.7% |
| CFS | 0.9% | 2.6% | <0.001 | 4.3% | 6.8% | 0.044 | 9.3% |
| PID | 5.9% | 9.1% | 0.001 | 12.9% | 16.0% | ns | 11.2% |
| RSI | 2.0% | 4.2% | <0.001 | 4.0% | 4.3 | ns | 3.9% |
| Migraine | 17.5% | 32.7% | <0.001 | 24.7 | 30.6 | 0.027 | 34.5% |
| Paracetamol >50 pa | 10.0% | 21.9% | <0.001 | 26.8 | 34.5 | 0.004 | 33.8% |
| No contact healthcare 1 year | 8.3% | 3.1% | <0.001 | 3.4 | 2.1 | ns | 2.1% |
| Continuous variables | |||||||
| Mean age | 44.0 (12.8) | 46.2 (11.7) | <0.001 | 45.5 (12.9) | 46.3 (12.0) | Ns | 48.7 (10.9) |
| Mean BMI | 25.9 (4.2) | 27.2 (4.9) | <0.001 | 26.9 (4.9) | 27.5 (5.3) | 0.024 | 27.7 (5.2) |
| Life events & difficulties score | 2.6 (1.7) | 3.0 (1.8) | <0.001 | 3.2 (1.7) | 3.3 (1.7) | ns | 3.09 (1.75) |
| PSQI | 3.8 (2.2) | 5.4 (3.8) | <0.001 | 4.9 (2.7) | 6.3 (3.5) | p < 0.001 | 5.4 (3.0) |
| Score SCL Somatization | 15.5 (3.6) | 18.9 (4.7) | <0.001 | 24.8 (6.4) | 26.4 (6.1) | p < 0.001 | 22.8 (6.7) |
| General health perception | −0.08 (0.6) | −0.36 (0.67) | <0.001 | −0.53 (0.72) | −0.77 (0.7) | 0.004 | −0.63 (0.73) |
FM, fibromyalgia; RA, rheumatoid arthritis; IBS, irritable bowel syndrome; CFS, chronic fatigue syndrome; PID, prolapsed intervertebral dis; RSI, repetitive strain injury; GERD, gastroesophageal reflux disorder; PSQI, Pittsburgh sleep quality inventory; SCL, symptom checklist.