Simplifying ICF Assessment for Individuals with Spinal Cord Injury with Lower Limb Dysfunction Using Item Response Theory and Graphical Models.

The four-parameter logistic model, comprising 38 ICF items, was identified as the optimal model.

The estimated person ability parameter (θ) showed significant positive correlations with external measures.

Graphical modeling indicated that interventions targeting key functional items, such as d420 (Transferring Oneself) and d415 (Maintaining a Body Position) were expected to produce significant overall functional benefits for patients.