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NATURAL HISTORY AND GENETICS OF FROZEN SHOULDER A 1–20 YEAR FOLLOW UP OF 273 PATIENTS.



Abstract

This is the largest reported natural history study of frozen shoulder. 500 patients were identified from a specialist shoulder clinic register with a diagnosis of frozen shoulder based on Codman’s criteria. 273 patients with primary frozen shoulder replied to a detailed postal questionnaire regarding their condition. Mean follow up from symptom onset was 52 months (range 12–240months), with 89% of shoulders followed up for a minimum of 3 years. A positive family history was identified in 20% (n=45) of 1st degree relatives. The relative risk to siblings compared with a control population was 4:1. Patients with mild to moderate symptoms recovered more quickly than those with severe or unbearable symptoms. The mean age of onset was 53 years (range27–85yrs). The female to male ratio was 1.6:1. The condition was bilateral in 20%, with no incidence of ipsilateral recurrence. 22% of patients reported a history of minor trauma to the upper limb prior to the onset of symptoms. 16% were diabetic and 4% reported a history of Dupuytren’s contracture. Right and left arms were affected equally with no relationship to hand dominance. 61% reported slow, and 39% reported sudden onset of symptoms. Generally pain and stiffness improved with time but at 3 and 4 years after onset 13% and 9% respectively still had symptoms.

Frozen shoulder affects people mainly in their 6th decade. Genetic factors play an important role in the aetiology. The natural history is for improvement with time, with the less severe symptoms at onset improving most quickly. 9% of patients were still symptomatic at 4 year follow up.

Correspondence should be addressed to BESS c/o BOA, 35-43 Lincoln’s Inn Fields, London WC2A 3PE