. 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 6.

Scoring Method 2 – Percentages of Children Correctly Classified by Total Percentage of Phonemes Correct (TPPC)

		Clinical classification

		SLI	TD	Predictive Values
NRT score	SLI (≤ 68%)^a	23	5	ppv = 82%

	TD (> 68%)^a	6	42	npv = 88%
	Percentage Classified Correctly	Sensitivity = 23/29 = 79% (65–93%)^b	Specificity = 41/47 = 89% (81–97%)^b

Cutoff scores.

95% confidence intervals.