Subretinal drusenoid deposits in the elderly in a population-based study (the Montrachet study)

Abstract

PURPOSE. The aim of this study was to investigate the prevalence of subretinal drusenoid deposits (SDD) and to identify associated factors in an elderly population. METHODS. The participants of the population-based Montrachet study underwent an exhaustive ophthalmologic examination, including color fundus photography and macular spectral domain-optical coherence tomography (SD-OCT), coupled with infrared reflectance imaging. The presence of SDD and other age-related macular degeneration lesions, according to the European Eye Epidemiology SD-OCT classification of macular diseases, and subfoveal choroidal thickness were recorded. Moreover, the association of SDD and both clinical and demographic factors as well as plasma levels of vitamin E and lutein/zeaxanthin (L/Z) were analyzed. RESULTS. The mean age of patients was 82.3 6 3.8 years and 62.7% were female. The prevalence of SDD was 18.1% (n ¼ 205) in the subjects with at least one eye interpretable (n ¼ 1135). In multivariate analysis, SDD was positively associated with increasing age (OR, 4.6; 95% CI, 2.8–7.7; P < 0.001 for subjects aged >85 years), female sex (OR, 1.7; 95% CI, 1.2–2.4; P ¼ 0.005), and plasma L/Z level (OR, 1.2; 95% CI, 1.0–1.5; P ¼ 0.039), and negatively associated with lipid-lowering drugs use (OR, 0.5; 95% CI, 0.3–0.9; P ¼ 0.014 for statin medications) and subfoveal choroidal thickness (OR, 0.8; 95% CI, 0.7–0.9; P ¼ 0.002). CONCLUSIONS. The prevalence of SDD was high in subjects older than 75 years, more frequent in women, and was associated with a thinner choroid. The association with lipid-lowering drugs deserves further investigation.