. Author manuscript; available in PMC: 2018 Oct 1.

Published in final edited form as: J Autism Dev Disord. 2017 Oct;47(10):3296–3310. doi: 10.1007/s10803-017-3231-0

Table 5.

Comparison of Positive Predictive Value, Sensitivity & Specificity of CART Model Between Younger and Older Toddler Age Groups (Criterion: ASD Diagnosis) – Words Produced Included

Measure			95% Confidence		Difference		Equivalence
Measure	Value	SE	Interval		Z	p	Z₁	p₁	Z₂	p₂

*PPV*

< 20 Months	0.72	0.06	0.60	0.85	−1.96	.050	3.206	<.001	−0.718	.076

20+ Months	0.88	0.05	0.79	0.97

*Sensitivity*
< 20 Months	0.87	0.05	0.77	0.96	−0.80	0.425	2.393	.008	0.798	.215

20+ Months	0.92	0.04	0.84	0.99

*Specificity*

< 20 Months	0.85	0.05	0.75	0.95	−0.53	.599	1.983	.024	0.93	.176

20+ Months	0.88	0.07	0.80	0.97

Difference
Equivalence	<20 Months n=48
Indeterminate	20+ Months n=50