Association of Range of Motion Deficit and Recurrence of Pain After Treatment of Adhesive Capsulitis.

Introduction: We evaluated the factors influencing the duration of significant pain reduction after conservative management for adhesive capsulitis (AC).

Methods: Follow-up for 6-8 months was performed with 141 patients with AC who experienced significant pain reduction after treatment. Clinical and demographic factors, numeric rating scale (NRS) scores, and shoulder range of motion (ROM) were collected and assessed pretreatment (T0), at 5 weeks post-treatment (T1), and at 6-8 months post-treatment (T2). Patients were divided into successful (n = 96) and unsuccessful (n = 45) NRS groups according to the degree of pain reduction at T2. We assessed post-treatment NRS and ROM improvement scores within each group and compared these parameters between the two groups.

Results: Significant NRS and ROM improvements were achieved in all patients who participated in our study. The unsuccessful NRS group demonstrated a lack of significant improvement in abduction at T1 and T2. All T1 and shoulder ROM measurements among the unsuccessful NRS group were significantly smaller than those among the successful NRS group.

Conclusions: Failure to achieve a significant improvement in abduction angle after conservative management of AC was significantly associated with pain recurrence.