Table 1 Conditions and drug exposures excluded in study subjects.
| Exclusion criteria in patients with arthritis and controls | Exclusion criteria in controls only | |||
|---|---|---|---|---|
| Conditions | Drugs | Conditions | Drugs | |
| SLE | Behçet's disease | Antiepileptics | Uveitis | Prednisone |
| MCTD | IBD | Medroxyprogesterone acetate | Diabetes | Methylprednisolone |
| Sjögren's syndrome | Sickle cell disease | Lithium | Hyperthyroidism | Methotrexate |
| Scleroderma | Rheumatic fever | Cholestyramine | Hypothyroidism | Etanercept |
| Vasculitis | Rickets | Leuprolide | Lymphoedema | Infliximab |
| Sarcoidosis | Cerebral palsy | Antipsychotic drugs | Psoriasis | Anakinra |
| Inflammatory neuropathy | Cystic fibrosis | Leflunomide | ||
| Multiple sclerosis | Seizures | Hydroxychloroquine | ||
| Inflammatory myopathy | Asthma | Sulfasalazine | ||
| Non‐inflammatory myopathy | Coeliac disease | Ciclosporin A | ||
| Osteogenesis imperfecta | Renal insufficiency | Thyroid active drugs | ||
| Organ transplant | Malignancy | |||
SLE, systemic lupus erythematosus; MCTD, mixed connective tissue disease; IBD, inflammatory bowel disease.