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. Author manuscript; available in PMC: 2020 Dec 1.

Published in final edited form as: Int J Behav Med. 2019 Dec;26(6):600–607. doi: 10.1007/s12529-019-09826-y

Table 4.

Hierarchical Logistic Regression for Perseverations

	Step 1				Step 2
Predictor Variable	β	Odds Ratio	SE	p	β	Odds Ratio	SE	p

FEV1 % Predicted	0.02	1.02	0.01	0.075	0.02	1.03	0.01	0.045
Age	---		---	---	−0.14	.87	0.06	0.016
Pack-years	---		---	---	<0.01	1.00	0.01	0.725
Sleep Apnea Status	---		---	---	-1.10	.33	0.80	0.169
WRAT 4	---		---	---	−0.04	.96	0.05	0.417
HADS	---		---	---	0.10	1.11	0.08	0.213
Nagelkerke R²	0.06				0.29
R² Change					0.23