Development of an 18-Item Measure of Symptom Burden in Patients With Glaucoma From the Collaborative Initial Glaucoma Treatment Study's Symptom and Health Problem Checklist.

Importance: Administration of a brief questionnaire to evaluate glaucoma symptoms would lend useful information for patient care.

Objectives: To develop a shortened glaucoma symptom measure based on the Collaborative Initial Glaucoma Treatment Study (CIGTS) Symptom and Health Problem Checklist (SHPC) and evaluate its psychometric properties.

Design, Setting, And Participants: This measure development study evaluated the factor structure of the 43-item SHPC that was obtained from CIGTS participants at baseline and every 6 months thereafter.