Percentage of respondents with additional symptoms. The unexplained musculoskeletal pain group and arthralgia group were compared to the control cohort. The denominator in each cell indicates the number of survey respondents who provided a response for that symptom.
| Symptom | Controls Reporting Symptom(s), n (%) | Arthralgia Group Reporting Symptom(s), n (%) |
|---|---|---|
| Back pain | 43/936 (4.6) | 118/478 (24.7)* |
| Fatigue | 37/936 (4) | 138/478 (28.9)* |
| Chest pain | 18/936 (2) | 68/474 (14.3)* |
| Joint pain | 61/938 (6.5) | 385/474 (79.5)* |
| Muscle pain or weakness | 42/939 (4.5) | 185/479 (38.6)* |
| Shortness of breath | 47/936 (5) | 69/477 (14.5)* |
| No. of symptoms | ||
| No additional symptoms** | 780/936 (83.3) | 59/472 (12.5) |
| 1** | 104/936 (11.1) | 165/472 (35.0) |
| 2** | 33/936 (3.5) | 105/472 (22.2) |
| 3** | 9/936 (1.1) | 68/472 (14.4) |
| 4** | 5/936 (0.5) | 38/472 (8.1) |
| 5** | 4/936 (0.4) | 24/472 (5.1) |
| 6** | 1/936 (0.1) | 13/472 (2.8) |