Table 5.

Simultaneous Multiple Linear Regression Model: Prediction of Executive Functioning/Processing Speed from CDS Praxis

Overall Model: Adjusted R²=.302, F=6.447 (p<.001)

Independent Variable	Unstandardized b	SE	Semi-partial Correlation	p
Age	−0.138	0.094	−.130	0.147
Sex
Male	Reference
Female	4.573	1.224	.333	<0.001
Pack-years	0.009	0.019	.040	0.654
Estimated Premorbid IQ (WRAT-IV)	0.305	0.081	.334	<0.001
Depression and Anxiety (HADS)	−0.148	0.138	−.096	0.286
COPD Diagnosis
No COPD	Reference
COPD	−2.666	1.349	−.176	0.051
CDS Praxis Subscale
No Impairment	Reference
Yes Impairment	−3.646	1.253	−.259	0.005

Note: The variables are bolded if they were significant (p<.05).