Quality of life: Investigating the impact of two major mental disorders, anxiety and depression, in patients with age-related macular degeneration

Abstract

Purpose: The purpose of this study was to investigate the impact on the quality of life of patients with age-related macular degeneration (AMD) in relation to common mental disorders, namely anxiety and depression, and determine specific factors (e.g., thoughts/feelings, sociodemographic characteristics) that may be used to refer such patients to psychiatrists. Materials–Methods: To classify the patients into different categories, regarding the development of the mental disorders under consideration, the “Hospital Anxiety and Depression Scale” (HADS) has been utilized. The main statistical methodologies applied are classification and regression trees (CART) techniques and logistic regression. For the purposes of the aforementioned statistical analysis, the R software package has been used. Results: Both depression and anxiety scores varied considerably across visual acuity (VA) severity. Patients with severe visual acuity problems tend to have also higher HADS scores. Women were more likely to be affected by depression; sociodemographic factors did not have any significant effect. According to the performed CART analysis, responses to two HADS items (namely, “I can enjoy a good book or radio or television program” and “I have lost interest in my appearance”) identified the vast majority of severely to moderately depressed patients. Furthermore, the level of VA severity was found as a main driver for diagnosing an AMD patient with depression. Conclusions: VA impairment (or decline) severity level was found to be the main factor associated with depression in patients with AMD. Moreover, specific thoughts/feelings present in patients with AMD have been found as significant regarding the level of their mental disorders under consideration and could be asked by the ophthalmologist to refer (or not) them to psychiatrists.