A Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in Nursing Science Faculty of Nursing Chulalongkorn University Academic Year 2022

This correlational study aimed to 1) investigate mobility and 2) examine direct and indirect paths of relationships among comorbidity, cognitive function, social support, pain, fatigue, and sleep quality on mobility among persons with hip fracture after surgery. The hypothesized model was constructed based on the theory of unpleasant symptoms and the literature reviewed. A three-stage random sampling approach was utilized to recruit 260 persons with hip fracture after surgery aged 50 years old and older who visited four hospitals in three health regions of Thailand. Research measurements consisted of the demographic data form, Charlson Comorbidity Index, General Practitioner Assessment of Cognition, Groningen Orthopedic Social Support Scale, Fatigue Severity Scale, Pittsburgh Sleep Quality Index, Numerical rating scale, and de Morton Mobility Index. Data were collected from July 2022 to February 2023. The data analysis using SPSS and Mplus program