Publications by authors named "Janek Klawe"
Purpose: To identify risk factors associated with the development of corneal edema (CE) and the need for corneal transplantation following cataract surgery.
Design: Retrospective cohort study.
Methods Setting: Nation-wide sample of Medicare beneficiaries from 2011-2015.
Purpose: The purpose of this study was to investigate the impact of demographic characteristics and psychiatric comorbidity on the prevalence of dry eye disease in the American geriatric population.
Methods: Data were collected from a 2011 nationwide sample of Medicare beneficiaries aged 65 years and older (N = 1,321,000). Age, sex, race/ethnicity, residential area, climate region, and income, along with psychiatric comorbidities including depression and anxiety, were collected.
Purpose: To examine the relationship between diabetic retinopathy (DR) and depression in the United States.
Design: Retrospective, cross-sectional study.
Methods: National Health and Nutrition Examination Survey (NHANES) participants between 2005 and 2008 (ages 40-85 years) were included.
Purpose: To assess the relationship between serum vitamin D levels and myopia in people aged 12-50 years using the National Health and Nutrition Examination Survey (NHANES) database.
Methods: Demographics, vision, and serum vitamin D levels from NHANES (2001-2006) were analyzed. Multivariate analyses were performed to examine the relationship between serum vitamin D levels and myopia while controlling for sex, age, ethnicity, education level, serum vitamin A, and poverty status.
Purpose: The aim of this study was to determine the relationship between anthropometric measures and steep cornea.
Methods: Participants from the 1999 to 2008 US National Health and Nutrition Examination Survey visual examination were included (20,165 subjects). Cases had a mean dioptric power, averaged across the meridians, ≥ 48.
Purpose: To assess factors associated with gender disparities in cataract surgery volume and evaluate how these differences have changed over time.
Setting: Cataract surgeons in the 2012 to 2018 Medicare database.
Design: Retrospective study.
Background/aims: To assess surgical patterns in ophthalmology by subspecialty in the USA.
Methods: Ophthalmic surgeons were categorised as comprehensive/subspecialist based on billed procedures in the 2017-2018 Medicare Provider Utilization and Payment Data. Poisson regression models assessed factors associated with physicians performing surgeries in the core domain (eg, cataract extractions) and subspecialty domain.
Purpose: To study astigmatism and astigmatism rule by (1) determining changes in prevalence in the United States between 1971 to 1975 and 1999 to 2008 and (2) identifying associations with demographic factors.
Setting: National survey.
Design: Retrospective cross-sectional study.
Objectives: To report real-world long-term survival of primary penetrating keratoplasty (PK) in the United States and analyze risk factors associated with failure.
Design: Retrospective longitudinal cohort study using a large commercial insurance database.
Participants: Ten million patients enrolled in the database from 2011 to 2017 were identified using Current Procedural Terminology codes for PK.
Purpose: To assess the factors influencing the Medicare collections disparity between male and female ophthalmologists.
Design: Retrospective cohort study.
Methods: The Medicare Provider Utilization and Payment Data from 2012-2015 were combined with the 2015 Physician Compare National Downloadable file and US Census data.