Publications by authors named "David Vollman"
Purpose: To describe the treatment patterns and the predictors of different treatment standards in recently diagnosed diabetic macular edema (DME) patients in a nationally representative sample.
Design: A retrospective cohort study using administrative claims data from January 1, 2007, through March 31, 2015. Patients were grouped into yearly cohorts.
Purpose: To compare the impact of first eye versus second eye cataract surgery on visual function and quality of life.
Design: Cohort study.
Participants: A total of 328 patients undergoing separate first eye and second eye phacoemulsification cataract surgeries at 5 veterans affairs centers in the United States.
Objective: To compare clinical outcomes of cataract surgery in eyes with and without pseudoexfoliation (PXF).
Design: Retrospective deidentified data analysis.
Participants: A total of 123 PXF and 4776 non-PXF eyes of patients who underwent cataract surgery.
Somatic Variants in the Human Lens Epithelium: A Preliminary Assessment.
Invest Ophthalmol Vis Sci
August 2016
Purpose: We hypothesize that somatic mutations accumulate in cells of the human lens and may contribute to the development of cortical or posterior sub-capsular cataracts. Here, we used a Next-generation sequencing (NGS) strategy to screen for low-allelic frequency variants in DNA extracted from human lens epithelial samples.
Methods: Next-Generation sequencing of 151 cancer-related genes (WUCaMP2 panel) was performed on DNA extracted from post-mortem or surgical specimens obtained from 24 individuals.
Purpose: To explore the association of American Society of Anesthesiologists (ASA) classification with cataract surgery outcomes.
Setting: Five Veterans Affairs Medical Centers, United States.
Design: Retrospective observational cohort study.
Importance: The publication of the US Physician Payments Sunshine Act provides insight into the financial relationship between physicians and the pharmaceutical industry. This added transparency creates new opportunities of using objective data to better understand prior research that implicates pharmaceutical promotions as an important factor in a physician's decision-making process.
Objective: To assess the association between reported industry payments and physician-prescribing habits by comparing the use of anti-vascular endothelial growth factor (VEGF) intravitreal injections by US ophthalmologists to the industry payments these same physicians received.
Purpose: To explore visual outcomes, functional visual improvement, and events in resident-operated cataract surgery cases.
Setting: Veterans Affairs Ophthalmic Surgery Outcomes Database Project across 5 Veterans Affairs Medical Centers.
Design: Retrospective data analysis of deidentified data.
Purpose: To compare visual acuity outcomes, vision-related quality of life, and complications related to cataract surgery in eyes with and without glaucoma.
Design: Retrospective cohort study.
Methods: Cataract surgery outcomes in cases with and without glaucoma from the Veterans Affairs Ophthalmic Surgical Outcomes Data Project were compared.
Purpose: To determine if cataract surgery on eyes with AMD confers as much functional visual improvement as surgery on eyes without retinal pathology.
Methods: This is a retrospective analysis of 4924 cataract surgeries from the Veterans Healthcare Administration Ophthalmic Surgical Outcomes Data Project (OSOD). We included cases of eyes with AMD that had both preoperative and postoperative NEI-VFQ-25 questionnaires submitted and compared their outcomes with controls without retinal pathology.
Purpose: To estimate the prevalence of untoward events during cataract surgery with the use of pupillary expansion devices and intraoperative floppy iris (IFIS).
Design: Retrospective analysis of 4923 cataract surgery cases from the Veterans Affairs Ophthalmic Surgical Outcomes Data Project.
Methods: Outcomes from 5 Veterans Affairs medical centers were analyzed, including use of alpha-blockers (both selective and nonselective), IFIS, intraoperative iris trauma, intraoperative iris prolapse, posterior capsular tear, anterior capsule tear, intraoperative vitreous prolapse, and use of pupillary expansion devices.
Objective: To examine the economic implications for the Canadian health system of pharmacologic treatment of neovascular age-related macular degeneration (AMD).
Design: Systematic review of economic literature and a primary economic evaluation.
Participants: Economic literature search identified 392 potentially relevant articles, 12 of which were included for final review.
The objective of this study is to describe the epidemiology of playground equipment-related injuries. This is a retrospective analysis of data for children 18 years old and younger from the National Electronic Injury Surveillance System of the United States Consumer Product Safety Commission for 1996 through 2005. There were an estimated 2,136,800 playground equipment-related injuries to children 18 years and younger treated in hospital emergency departments in the United States during the 10-year period.
View Article and Find Full Text PDFObjective: Our objective for this study was to describe the epidemiology of lawn mower-related injuries among children in the United States.
Methods: A retrospective analysis was conducted of data from children who were 20 years and younger in the National Electronic Injury Surveillance System of the United States Consumer Product Safety Commission for 1990-2004.
Results: There were an estimated 140700 lawn mower-related injuries to children who were 20 years and younger and treated in hospital emergency departments in the United States during the 15-year period of 1990-2004.
Background: Despite current prevention efforts, approximately 9,400 children younger than 18 years continue to receive emergency care for lawn mower-related injuries each year in the United States.
Methods: In this study, we analyzed data from a consecutive series of children treated for lawn mower-related injuries during a 53-consecutive-month period in the emergency department of a large, academic children's hospital. The objective of this study was to describe the epidemiology of lawn mower-related injuries to these children and to investigate the beliefs of parents regarding lawn mower use.
Background/purpose: Concern about an increased lifetime risk of cancer in children who have undergone a single computed tomography (CT) scan prompted us to review utilization of this diagnostic test in our appendicitis population.
Methods: From 1998 to 2001, the records of 720 children admitted to our hospital with a diagnosis of appendicitis were reviewed for adjunct diagnostic modalities, including ultrasonography (USG) and CT scanning. Negative appendectomy rates were determined by the final pathologic report.