. Author manuscript; available in PMC: 2011 Jul 1.

Published in final edited form as: Lang Speech Hear Serv Sch. 2010 Apr 26;41(3):277–288. doi: 10.1044/0161-1461(2009/08-0096)

Table 4.

Scoring Method 1 – Percentages of Children Correctly Classified by Total Percentage of Phonemes Correct (TPPC)

		Clinical classification

		SLI	TD	Predictive Values
NRT Score	SLI (≤ 66%)^a	25	4	ppv = 86%

	TD (> 66%)^a	4	43	npv = 91%

	Percentage Classified Correctly	Sensitivity = 25/29 = 86% (73 – 99%)^b	Specificity = 43/47 = 91% (83 – 99%)^b

Cutoff scores.

95% confidence intervals.