Improving the positive predictive value of screening for developmental language disorder

Author(s): Pearce, K., Carson, D. K.

Journal/Book: J Speech Lang Hear Res. 2000; 43: 10801 Rockville Pike, Rockville, MD 20852-3279, USA. Amer Speech-Language-Hearing Assoc. 821-833.

Abstract: In previous study, we reported the results of an early language screening program in which 306 children were screened using a parent-report questionnaire sent through the mail (Klee et al., 1998). A sample of the children screened were given clinical evaluations within a month of screening (n = 64) and again 1 year later (n = 36). Although the screening program correctly identified 91% of 2-year-olds with language delay, it produced a large number of over-referrals. In the present study we examine a revised screening criterion designed to reduce the number of False positives. The revised criterion generated fewer positive screens overall than the original and resulted in improved specificity (96% vs. 87%) and positive predictive value (77% vs. 51%), while maintaining the high sensitivity (91%) and negative predictive value (98%) of the original criterion. We also propose a screening score based on the new criterion, designed to inform the process of deciding which children to bring in for Further evaluation.

Note: Article Klee T, Univ Newcastle Upon Tyne, Dept Speech, King George VI Bldg, Queen Victoria Rd, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, ENGLAND

Keyword(s): language screening; language delay; vocabulary checklist; parental questionnaire; developmental language disorder; KINDERGARTEN-CHILDREN; OTITIS-MEDIA; SPEECH; IMPAIRMENT; VALIDITY; DIFFICULTIES; PREVALENCE; CONCURRENT; TODDLERS; SYSTEM

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