研究目的
To evaluate change in subfoveal choroidal thickness (SCT) as measured by spectral-domain optical coherence tomography (SD-OCT) in patients with neovascular age-related macular degeneration (NVAMD) undergoing anti–vascular endothelial growth factor (VEGF) therapy.
研究成果
Choroidal thickness decreases over time in eyes with NVAMD, but anti-VEGF therapy does not accelerate or alter this decline. The only significant factor influencing choroidal thickness was patient age.
研究不足
Retrospective design leading to selection bias, use of multiple SD-OCT instruments, variability in follow-up intervals and injection frequency, assumption of linear reduction in choroidal thickness, potential diurnal variation in choroidal thickness, and limited statistical power due to sample size.
1:Experimental Design and Method Selection:
Retrospective review of patients with NVAMD to assess changes in SCT over time using SD-OCT imaging. Manual measurement of SCT from Bruch membrane to the choroid–sclera junction. Statistical analysis to correlate SCT changes with treatment characteristics.
2:Sample Selection and Data Sources:
Patients with active NVAMD seen at Doheny Eye Institute between January 2006 and November 2010, with at least 12 months of follow-up and SD-OCT imaging. Exclusion of eyes with confounding diseases or poor image quality.
3:List of Experimental Equipment and Materials:
SD-OCT instruments (3D-OCT-1000 by Topcon Medical Systems, Cirrus HD-OCT by Carl Zeiss Meditec), grading software (3D-OCTOR, Zeiss Research Browser), statistical software (Intercooled STATA 9.0 by StataCorp LP).
4:0 by StataCorp LP).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: SD-OCT imaging using standardized protocols, manual grading of SCT by certified graders, data collection from medical charts, statistical analysis using linear regression models.
5:Data Analysis Methods:
Calculation of annual rate of change in SCT, multivariate linear regression with backward elimination, correlation analysis with treatment and visual acuity parameters.
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