Validity and reliability of the MTI photoscreener.

摘要: OBJECTIVES The prevalence and necessity for early detection of vision problems illustrate the need improved methods screening in preschool children. This study assessed validity reliability a new device, MTI photoscreener cross-sectional field study. METHODS An appropriate sample size (> 140) was calculated recruited All children (N = 161) migrant workers summer education program were screened with Photoscreener. Simultaneously masked design, disease status determined by Modified Clinic Technique, well established method diagnosing conditions which screener designed to detect. RESULTS Validity measures revealed sensitivity 54%, specificity 87%, phi coefficient 0.40, positive predictive value 52%. Repeatability kappa coefficient, test effect modification examiner, comparison across 12 examiners. 0.38. A suggested that differences existed among Variability high, but variability low. CONCLUSIONS Methods are limited. Photoscreener is an easy efficient method, concern. Comparison our results other studies suggests future potential this instrument provided protocols refined further reveal efficacy.