Appendix Table 1.
ICD9 Inclusion Codes for Cohort Identification
| ICD9 Code | Description |
|---|---|
| 307.89 | Psychogenic backache |
| 721.3 | Lumbosacral spondylosis w/o myelopathy |
| 721.5 | Kissing spine (Baastrup Disease) |
| 721.6 | Ankylosing vertebral hyperostosis |
| 721.7 | Traumatic spondylopathy |
| 721.8 | Other allide disorders of spine |
| 721.9 | Spondylosis of unspecified site w/o myelopathy |
| 722.1 | Displacement of thoracic or lumbar disc w/o myelopathy |
| 722.2 | Degeneration of intervertebral disc, site unspecified |
| 722.3 | Schmorl's bides |
| 722.5 | Degeneration of thoracic or lumbar intervertebral disc |
| 722.6 | Degeneration of intervertebral disc, site unspecified |
| 722.9 | Other and unspecified disc disorder of unspecified region |
| 724 | Other and unspecified disorders of back |
| 724.0 | Spinal stenosis, not cervical |
| 724.1 | Pain in thoracic spine |
| 724.2 | Lumbago |
| 724.3 | Sciatica |
| 724.4 | Back pain with radiation, unspec |
| 724.5 | Backache, unspecified |
| 724.6 | Disorders of sacrum (including lumbosacral junction) |
| 733.10 | Pathologic fractures, unspecified site |
| 733.13 | Pathologic fractures: vertebrae |
| 733.93 | Stress fracture of other bone |
| 738.4 | Acquired spondylolisthesis |
| 738.5 | Other acquired deformity of back or spine |
| 739.2 | Nonallopathic lesions-thoracic, not elsewhere classified |
| 739.3 | Nonallopathic lesions-lumbar, not elsewhere classified |
| 739.4 | Nonallopathic lesions-sacral, not elsewhere classified |
| 756.11 | Spondylolysis |
| 756.12 | Spondylolisthesis |
| 846.0 | Lumbosacral sprain |
| 846.1 | Sacroiliac (ligament) sprain |
| 846.2 | Sacrospinatus (ligament) sprain |
| 846.3 | Sacrotuberous (ligament) sprain |
| 846.8 | Other specified sites of sacroiliac region sprain |
| 846.9 | Unspecified site of sacroiliac region sprain |
| 847.2 | Thoracic sprain |
| 847.3 | Sacral sprain |
| 847.9 | Sprain – unspecified site of back |