Reliability and Validity of Questionnaire for Adhesive Capsulitis

Adhesive capsulitis (AC), also known as frozen shoulder, is a condition characterized by pain and significant loss of both active range of motion and passive range of motion of the shoulder. It usually affects patients aged 40-70 years, with females affected more than males, and no predilection for race. The prevalence of adhesive capsulitis is estimated to be 2% to 5% of the general population and higher incidence of frozen shoulder among patients with diabetes (10-20%), there is an even greater incidence among patients with insulin dependent diabetes (36%), with increased frequency of bilateral shoulder involvement. The available questionnaires take in to account the constructs of pain and/or functional limitations of the shoulder but do not assess psychological or social problems related to the conditions of the shoulder. Till date no questionnaire specific to AC has been found in literature, therefore, the objective of this study is to design a comprehensive questionnaire to assess prevalence, risk factors, impact and healthcare utilization among subjects with adhesive capsulitis. The content validity and reliability of the questionnaire was established. Items showing acceptable internal consistency, test-retest reliability are considered in the final questionnaire. The questionnaire is ready with necessary amendments and will be used on larger sample size in main study.