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Validity of self-reported eye disease and treatment in a population-based study: the Los Angeles Latino Eye Study
Lauren Patty1, Cathy Wu, Mina Torres
1Doheny Eye Institute and Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033, USA.
Purpose:
To examine the validity of self-reported eye disease, including cataract, age-related macular degeneration (AMD), glaucoma, and diabetic retinopathy (DR), and self-reported surgical treatment for cataract and DR in the Los Angeles Latino Eye Study (LALES).
Design:
Population-based, cross-sectional study.
Participants:
A total of 6357 Latinos aged 40+ years from the LALES.
Methods:
Participants underwent a detailed interview, including survey questions about ocular health, diagnoses, and timing of last eye examination, and a standardized clinical examination. Self-report was compared with examination to determine sensitivity and specificity by length of time since last eye examination. Stepwise logistic regression was used to determine factors associated with inaccurate self-report.
Main Outcome Measures:
Sensitivity and specificity were calculated for 4 self-reported eye diseases (cataract, AMD, glaucoma, and DR) and for surgical treatment of cataract and DR. Odds ratios (ORs) were determined for factors associated with inaccurate self-report underestimating eye disease and treatment.
Results:
For each disease, sensitivity and specificity in those who reported their last eye examination as <1 year ago were 36.8% and 92.5% for cataract, 37.7% and 96.3% for glaucoma, 5.1% and 98.9% for AMD, and 25.7% and 94.2% for DR, respectively. Self-report was less accurate with increasing time since last eye examination. Inaccurate self-report was independently associated with better visual acuity (OR, 2.4), <2 comorbidities (OR, 1.7), last eye examination/visit 1 to 5 years ago and ≥ 5 years ago (OR, 2.3 and 4.9, respectively), and less education (OR, 1.3 for 7-12 years and 1.7 for <7 years). Of 88 participants surgically treated for cataract who reported an eye examination <1 year ago, sensitivity and specificity of self-reported surgical history were 90.9% and 99.9%, respectively. Of the 31 participants treated for DR (laser/surgery) and reporting an eye examination <1 year ago, sensitivity and specificity of self-reported surgical history were 19.4% and 99.6%, respectively.
Conclusions:
Among Latinos, self-reporting of eye disease and surgical history provides a significant underestimate of the disease burden. This may lead to significant misclassification in vision research if self-report alone is used to identify persons with eye disease.
