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. Author manuscript; available in PMC: 2019 Jul 1.
Published in final edited form as: Res Dev Disabil. 2018 May 28;78:136–144. doi: 10.1016/j.ridd.2018.05.015

Table 3.

Estimated proportion of clinically elevated T scores (i.e., T > 65) on the Behavioral Regulation Index (BRI), Metacognition Index (MI), and Global Executive Composite (GEC) by speech-language profile group from binomial logistic models with overdispersion.

Group Proportion (%) LCL UCL Z-valuea P-valueb
BRI NSMIc 29.6 13.5 53.3 3.49 < 0.001*
SMI-LCT 50.0 28.4 71.6 5.58 < 0.001*
SMI-LCI 47.1 28.3 66.7 6.08 < 0.001*
MI NSMI 37.0 18.5 60.3 4.35 < 0.001*
SMI-LCT 50.0 28.2 71.8 5.53 < 0.001*
SMI-LCI 44.1 25.7 64.3 5.72 < 0.001*
GEC NSMI 37.0 18.8 59.8 4.44 < 0.001*
SMI-LCT 42.3 22.5 64.9 4.93 < 0.001*
SMI-LCI 47.1 28.5 66.5 6.16 < 0.001*

BRI: Test of Equal % among 3 groups: Chisq = 2.782, Df = 2, P = 0.384.

MI: Test of Equal % among 3 groups: Chisq = 0.913, Df = 2, P = 0.734. GEC: Test of Equal % among 3 groups: Chisq = 0.621, Df = 2, P = 0.803.

a

Z-value for testing against the null value of 6.68%, the percent over 65 in a normative population with mean 50 and SD = 10.

b

P-value for one-sided alternative that percent over 65 is greater than 6.68%.

c

NSMI: no speech motor involvement; SMI-LCT: speech motor involvement – language comprehension typical; SMI-LCI: speech motor involvement – language comprehension impaired.

*

P-values of 0.05 or less were considered significant.