So sánh phương pháp

	Thang đo Chức năng Chi dưới	Thang đo Đánh giá Toàn diện Sự thay đổi (Global Rating of Change Scale - GRC)
Lĩnh vực	Y học thể thao	Y học thể thao
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1999	1989
Người khởi xướng	Jill M. Binkley, Paul W. Stratford, Sheila A. Lott, Duane L. Riddle	Ruben Jaeschke, Jack Singer, Gordon H. Guyatt
Loại	Patient self-report	Patient global perception
Công trình gốc	Binkley JM, Stratford PW, Lott SA, Riddle DL. The Lower Extremity Functional Scale (LEFS): scale development, measurement properties, and clinical application. Phys Ther. 1999;79(4):371-383.	Jaeschke R, Singer J, Guyatt GH. Measurement of health status. Ascertaining the minimal clinically important difference. Control Clin Trials. 1989;10(4):407-415.
Tên gọi khác	LEFS	GRC, Global Rating of Change
Liên quan	4	4
Tóm tắt	The Lower Extremity Functional Scale (LEFS) is a 20-item patient self-report instrument designed to assess functional limitations in individuals with lower extremity musculoskeletal disorders. Developed by Binkley, Stratford, Lott, and Riddle in 1999 and published in Physical Therapy, the LEFS provides a validated, general lower-extremity outcome measure applicable across diverse pathologies (knee, ankle, hip, foot injuries and conditions), making it particularly valuable in physical therapy and rehabilitation settings.	The Global Rating of Change (GRC) Scale is a single-item, self-report outcome measure that asks patients to rate the overall change in their condition since baseline assessment. Developed by Jaeschke, Singer, and Guyatt in 1989 and published in Controlled Clinical Trials, the GRC Scale has become a fundamental method for anchor-based interpretation of change scores on clinical outcome measures, enabling clinicians and researchers to determine the minimal clinically important difference (MCID) in standardized scales.