The Spine Functional Index: development and clinimetric validation of a new whole-spine functional outcome measure.
Patient-Reported Outcome (PRO) questionnaires for people with pain in any spine region. A systematic review.
Validation of a Spanish version of the Spine Functional Index.
https://pubmed.ncbi.nlm.nih.gov/24972525/Cross-cultural adaptation, reliability and validity of the Turkish version of the spine functional index.
https://pubmed.ncbi.nlm.nih.gov/25879743/