Introduction to a multi-center cross-sectional study: a practical approach to feasible clinical research in daily practice

Abstract

This article introduces the process by which a physical therapist working at an orthopedic clinic transformed clinical questions arising from daily practice into a multi-center cross-sectional study. It also presents specific practical strategies employed during the research. Multi-center studies offer advantages such as securing a sufficient sample size and enhancing external validity. However, challenges such as differences in clinical practice and ethical procedures must be addressed. The author’s study was conducted in collaboration with six facilities across Japan, utilizing self-administered questionnaires and a standardized manual to reduce the burden on clinical staff while ensuring research reproducibility. This article aims not only to share methods for physical therapists to lead multi-center studies but also to highlight the value of research originating from clinical practice.