Accessibility statement

CaTS: A retrospective cohort study to establish the demographics of the UK population diagnosed with calcific tendinitis, and their current treatment pathways within the NHS


Calcific tendinitis of the shoulder is a disorder resulting from deposition of calcium hydroxyapatite within the substance of the rotator cuff tendons of the shoulder.  Symptomatic patients typically complain of symptoms including sudden, severe onset of activity related pain with limitation in the range of shoulder movement, troublesome night pain and associated sleep disturbance. 

The natural history of this condition is usually that of spontaneous symptom resolution in most cases, however the timeframe for this is observed to vary from several months to several years.  There are currently a number of treatment options used to try and expedite symptom resolution, including physiotherapy, ultrasound guided interventions and surgical procedures. 

The Study 

The CaTS study will help to determine the current demographics of the population with symptomatic calcific tendonitis of the shoulder, and give an overview of current UK practice for management of these patients once they have been diagnosed. 

Alongside this clinical study we are also completing a systematic review of current treatment options, and are considering the need for establishing a relevant core outcome set. 

This work will add to the existing knowledge base, and inform the design and conduct of future trials that will further evaluate the management of this condition.


Funder South Tees NHS Trust
Start Date January 2020
End Date July 2021