Statistical and Methodological Considerations for Vision Screening‗

Key Points

• The aim is to evaluate statistical measures and definitions used in vision screening programs.
• Discusses definitions of sensitivity, specificity, false positive, and false negative rates.
• Examines positive and negative predictive values alongside referral rates.
• Illustrates examples of these statistical measures.
• Defines key statistical terms related to vision screening.
• Provides a method to calculate standard error for sensitivity and specificity.
• Illustrates the relationship of rates to prevalence and expected results.