Evaluating the Quality of Life of Glaucoma Patients Using the State-Trait Anxiety Inventory.

Abstract

To evaluate anxiety felt by glaucoma patients. In total, 472 glaucoma patients responded to a questionnaire on anxiety, subjective symptoms, and vision-related quality of life (VR-QOL) associated with glaucoma. Anxiety was evaluated using the State-Trait Anxiety Inventory (STAI), state anxiety (STAI-State) subscale along with our novel questionnaire, assessing visual function and subjective symptoms, specialized for glaucoma. VR-QOL was evaluated using 5 subitems from the 25-item National Eye Institute Visual Function Questionnaire (VFQ-25). Adherence to ophthalmic antiglaucoma agents was confirmed. As indexes of visual function, corrected visual acuity (measured by eye chart), mean deviation (MD) score (measured with static perimetry), and 4 thresholds at the center of vision were determined. Stages were classified according to the Aulhorn Classification. From the STAI-State scores, the prevalence of anxiety in glaucoma patients was evaluated. We analyzed the correlation between the STAI-State and VFQ-25, anxiety, subjective symptoms, adherence, and visual function indexes. In total, 78% of glaucoma patients experienced at least an intermediate level of anxiety. The STAI-State correlated significantly with anxiety and subjective symptoms as measured by our novel questionnaire, particularly for questions "current anxiety about loss of vision" and "current anxiety in life" (r=0.468 and 0.500; both P<0.0001). However, STAI-State correlated weakly with VFQ-25, and not at all with visual function indexes and adherence. Many glaucoma patients feel anxiety. The STAI-State is correlated with the VR-QOL and anxiety in glaucoma patients, making it useful for understanding the anxiety present in glaucoma patients.