A statistical analysis of Modified Clinical Technique vision screening of preschoolers by optometry students.

摘要: Fourth year optometry students screened 745 preschoolers using a slightly altered Modified Clinical Technique (MCT) under the supervision of faculty doctor. Children who failed MCT were randomly selected and then matched by age, sex, ethnic origin to children had passed screening battery. The 61 failures 45 controls later given full eye examinations with cycloplegia University Alabama at Birmingham doctors unaware results. positive predictive value (PPV) (0.52) negative (NPV) (0.78) calculated directly from 2 × contingency table crossing results standard diagnosis. Sensitivity [0.50, k(1,0) = 0.29], specificity [0.79, k(0,0) 0.30], efficiency [0.70, k(0.5,0) 0.29] MCT, prevalence (0.30) failing diagnosis estimated statistics appropriate prospective sampling design