This study aimed to investigate the effects of nocturnal pain on clinical and ultrasonographic parameters in patients with rotator cuff tendinopathy.

Thirty patients with nocturnal pain, 30 patients without nocturnal pain, and 30 healthy subjects were included in the study. The demographic characteristics and body mass indexes of the patients were recorded. The visual analogue scale was used to determine pain severity. The American Shoulder and Elbow Surgeons Scale Assessment, Short Form-36 and Beck Depression Inventory were used to determine patients' shoulder function, general quality of life and depression levels, respectively. The peak systolic velocity and resistive index of anterior circumflex humeral artery was assessed with power doppler ultrasonography.The peak systolic velocity and resistive index of anterior circumflex humeral artery values of the affected and unaffected sides were compared.

Inclusion Criteria:

• Patients aged over 18 years diagnosed with rotator cuff tendinopathy

Exclusion Criteria:

• Severe limitation and pain in head and neck movements
• Loss of strength
• Sensation and reflexes loss in the upper extremity
• Limitation in passive shoulder movements on physical examination
• Systemic rheumatic disease
• Diabetes mellitus
• Malignant disease
• Active infection
• Intraarticular injection
• Trauma
• Dementia
• History of surgery
• Bilateral should pain
• Psychiatric discomfort
• Smoking history
• Antiinflammatory drugs or received physical therapy within the last 3 months
• Beck depression score of higher than 13.

Patients aged over 18 years diagnosed with rotator cuff tendinopathy attending our physical medicine and rehabilitation outpatient clinic and healthy volunteers