Assessment of Irt-Based Differential Item Functioning Between Levels of Disease Burden in the Quality of Life Impairment of Chronic Pain Patients

Abstract

A95stems, response options and symptoms. Results: The most neutral language base was Mexican Spanish, with 91% of its translation solutions agreeable to the other countries, closely followed by Argentina Spanish (87.5%) with Costa Rica at the bottom of the scale (41%). ConClusions: No matter which methodology is selected, a key facilitator in the process can be choosing the most neutral lead or base Spanish from which to create a version for other countries. We conclude that Mexico and Argentina are the optimal base countries. A study with a larger sample would be a worthwhile endeavour.