Predictors of Recurrence After Corticosteroid Injection for Trigger Digits

Abstract

Background: We aimed to identify risk factors for recurrence of trigger digit following corticosteroid injection. Methods: A retrospective review identified patients 18 years and older who presented to a single fellowship-trained hand surgeon with a symptomatic trigger digit during a 1-year period. Baseline demographic data were recorded. Patients with persistent trigger digit after a single injection were offered a second injection. Patients refusing a second injection were excluded from our analysis. Patients with persistent symptoms after 2 injections were offered surgery. For patients with diabetes mellitus, additional information regarding method of disease control and hemoglobin A_1c level was recorded. Results: The overall success of corticosteroid injection was 84% with 16% of patients requiring surgical release. Of the 240 patients successfully treated with injection, 99 (41%) required a second injection. Injections resulted in persistent triggering in 15% of patients with diabetes and 17% of patients without diabetes. A multivariate regression analysis revealed that the 2 strongest risk factors for requiring surgical release were patient age and patients whose fourth digit of the right hand was injected. Diabetes was not a risk factor for persistent triggering after corticosteroid injection. Conclusions: Our findings can be used to counsel patients prior to their initial injection and suggest that patients with diabetes can be managed with corticosteroid injection with equal efficacy compared with patients without diabetes.