PURPOSE: To compare age-related macular degeneration (AMD) phenotype between probands in singleton and multiplex families to determine whether data from these two groups may be combined for consolidated genetic analyses. DESIGN: Retrospective case-control study. METHODS: Individuals 55 years of age or older with AMD were identified. Complete histories and examinations were recorded, 35-mm fundus photographs obtained, and macular findings graded. Detailed information was recorded, including the presence of extramacular and peripheral drusen, peripheral reticular pigmentary change, posterior vitreous detachment, and iris color. Comparisons were performed between probands from singleton and multiplex families. RESULTS: There was no statistically significant difference in grade between the 411 singleton and 125 multiplex probands (P = .52), and the distribution of grades was similar between the two groups. No statistically significant difference was found between proband groups with respect to the presence or extent of small (P = .48), intermediate (P = .72), and large drusen (P = .74) and retinal pigment epithelium hyper- (P = .76) and hypopigmentation (P = .55); in the presence or grade of peripheral reticular pigment change; the presence of geographic atrophy in exudative disease, extramacular drusen, or posterior vitreous detachment; lens status; iris color; visual acuity; intraocular pressure; optic nerve cupping; and body mass index. A statistically significant difference between the two groups was noted in the presence of peripheral drusen (P = .0001). CONCLUSIONS: Singleton and multiplex AMD probands share a similar phenotype. This suggests that multiplex and singleton data can be combined for consolidated genetic analyses.
PURPOSE: To compare age-related macular degeneration (AMD) phenotype between probands in singleton and multiplex families to determine whether data from these two groups may be combined for consolidated genetic analyses. DESIGN: Retrospective case-control study. METHODS: Individuals 55 years of age or older with AMD were identified. Complete histories and examinations were recorded, 35-mm fundus photographs obtained, and macular findings graded. Detailed information was recorded, including the presence of extramacular and peripheral drusen, peripheral reticular pigmentary change, posterior vitreous detachment, and iris color. Comparisons were performed between probands from singleton and multiplex families. RESULTS: There was no statistically significant difference in grade between the 411 singleton and 125 multiplex probands (P = .52), and the distribution of grades was similar between the two groups. No statistically significant difference was found between proband groups with respect to the presence or extent of small (P = .48), intermediate (P = .72), and large drusen (P = .74) and retinal pigment epithelium hyper- (P = .76) and hypopigmentation (P = .55); in the presence or grade of peripheral reticular pigment change; the presence of geographic atrophy in exudative disease, extramacular drusen, or posterior vitreous detachment; lens status; iris color; visual acuity; intraocular pressure; optic nerve cupping; and body mass index. A statistically significant difference between the two groups was noted in the presence of peripheral drusen (P = .0001). CONCLUSIONS: Singleton and multiplex AMD probands share a similar phenotype. This suggests that multiplex and singleton data can be combined for consolidated genetic analyses.
Authors: Digna R Velez Edwards; Paul Gallins; Monica Polk; Juan Ayala-Haedo; Stephen G Schwartz; Jaclyn L Kovach; Kylee Spencer; Gaofeng Wang; Anita Agarwal; Eric A Postel; Jonathan L Haines; Margaret Pericak-Vance; William K Scott Journal: Invest Ophthalmol Vis Sci Date: 2009-11-20 Impact factor: 4.799
Authors: Kylee L Spencer; Lana M Olson; Nathalie Schnetz-Boutaud; Paul Gallins; Anita Agarwal; Alessandro Iannaccone; Stephen B Kritchevsky; Melissa Garcia; Michael A Nalls; Anne B Newman; William K Scott; Margaret A Pericak-Vance; Jonathan L Haines Journal: PLoS One Date: 2011-03-24 Impact factor: 3.240
Authors: Jeffrey A Canter; Lana M Olson; Kylee Spencer; Nathalie Schnetz-Boutaud; Brent Anderson; Michael A Hauser; Silke Schmidt; Eric A Postel; Anita Agarwal; Margaret A Pericak-Vance; Paul Sternberg; Jonathan L Haines Journal: PLoS One Date: 2008-05-07 Impact factor: 3.240