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Description of Musculoskeletal Morbidity Grades
| Description | Grade | No. of Patients* |
| Index joint, without spine | 1 | 416 (32.1%) |
| Index and other major joints, without spine | 2 | 479 (36.9%) |
| Index joint, with spine | 3 | 112 (8.6%) |
| Index and other major joints, with spine | 4 | 291 (22.4%) |
Data were missing for 29 patients, leaving 1,298 patients to be evaluated.
