Responsiveness and Minimal Clinically Important Changes of the Persian Version of the Back Pain Functional Scale and Spine Functional Index in Patients with Non-Specific Chronic Low Back Pain (pubmed.ncbi.nlm.nih.gov)

• High responsiveness of Persian BPFS and SFI
• MCID: BPFS 8.5, SFI 11.2 points
• Useful for clinical evaluation in chronic low back pain

"This study assessed responsiveness and MCID of the Persian versions of BPFS and SFI in non-specific chronic low back pain patients. Both tools showed good responsiveness, with MCID values of 8.5 for BPFS and 11.2 for SFI, supporting their clinical utility."