Table 5.

Step-wise selection logistic regression model to predict a secondary diagnosis of co-morbid AD in PDD patients.

Variable	Estimate	Std. Error	z value	P- value	Odds- Ratio	95% Confidence- Interval
(Intercept)	−9.82	2.66	−3.70	0.0002	<0.01	<0.01–0.01
Age of Motor Onset	0.12	0.04	3.19	0.0014	1.12	1.04–1.21
Global Cortical LB/LN Score	0.91	0.44	2.08	0.0372	2.48	1.06–5.82
CAA score	1.43	0.66	2.15	0.0319	4.16	1.13–15.30

^*based on 81 observations