An investigation of upper extremity function, sleep quality, and functional independence in patients with poststroke shoulder pain: a cross-sectional study

Background: Poststroke shoulder pain (PSSP) is a common poststroke complication. Even though it is a common phenomenon, it is unclear how it impacts the patient's life.Objective: To investigate the differences in upper extremity function, sleep quality, and functional independence between patients with and without PSSP.Methods: This cross-sectional study included 63 participants with stroke (32 patients with PSSP and 31 patients without PSSP). Shoulder pain was evaluated with a Visual Analog Scale and the participants were divided into two groups as those with and without PSSP. The upper extremity function was assessed with the Disabilities of the Arm, Shoulder, and Hand Questionnaire, the Arm Motor Ability Test, and the Nine Hole Peg Test. Sleep quality was assessed with Pittsburgh Sleep Quality Index and the functional independence was assessed with the Functional Independence Measure. All data were analyzed using the program IBM SPSS Statistics 22.0. The Mann-Whitney U test was used to compare the non-normally distributed parameters, and the Chi-square test was used to compare the ordinal variables. The Spearman correlation test was used for the relationship and a linear regression test was used for regression.Results: Upper extremity function decreased (p < .05), only the sleep disturbance sub-parameter of sleep quality increased (p = .01), and functional independence increased in patients with PSSP (p < .001). There was a moderate relationship between pain and upper extremity function and a fair relationship between pain and sleep quality (use of sleep medications, daytime dysfunction sub-parameters) (p < .05).Conclusions: PSSP impairs upper extremity functions, which play an important role in activities of daily living, and reduces functional independence. These results suggest that it is important to evaluate shoulder pain and examine the factors affecting pain in the rehabilitation of patients with stroke.