Patients undergoing spine surgery, who are the subjects eligible for participation to this observational prospective registry

Oswestry Disability Index score (ODI). Each topic category is followed by 6 statements describing different potential scenarios in the patient's life relating to the topic. The patient then checks the statement which most closely resembles their situation. Each question is scored on a scale of 0-5 with the first statement being zero and indicating the least amount of disability and the last statement is scored 5 indicating most severe disability. The scores for all questions answered are summed, then multiplied by two to obtain the index (range 0 to 100). Zero is equated with no disability and 100 is the maximum disability possible.

This project was based on the retrospective analysis of patients prospectively enrolled in a spinal surgery registry, SpineREG. The study aims to evaluate the equivalence of the PROMs registered in SpineREG using two different formats: paper vs. electronic version. Through the comparison between the data electronically provided in SpineREG and the paper questionnaires, the accuracy, reliability and validity of the data were evaluated.