. Author manuscript; available in PMC: 2011 Aug 24.

Published in final edited form as: J Cardiopulm Rehabil Prev. 2010 Mar-Apr;30(2):126–136. doi: 10.1097/HCR.0b013e3181be7e59

Table 5.

Predictors of Proportion of VLAs Affected

	Total	Obligatory	Committed	Discretionary
Sociodemographic
Age 55–60 years	−5.1 ^a	−6.9 ^b	−6.5 ^b	−3.6
Age 61−65 years
Age 66+ years (reference)	--	--	--	--
Female		−2.8	2.9	−3.2
White, non-Hispanic	−4.7 ^a	−6.3 ^a	−6.1 ^a
Education < HS
Unmarried/no partner
Model R²	.05	.06	.07	.04
Health status
Ever smoker
Obese
Comorbid conditions:
1	−3.8 ^a	−4.2 ^a		−3.8
2
Fatigue rating	2.7 ^d	2.0 ^c	2.8 ^d	2.9 ^d
Symptom days	1.1 ^d	1.0 ^d	1.3 ^d	1.0 ^d
Symptoms nights	0.7 ^c	1.1 ^d		0.9 ^c
Model R²	.55	.51	.51	.49
Functional limitations
Functional limitations score	21.3 ^d	23.9 ^d	23.3 ^d	18.4 ^d
Model R²	.66	.64	.61	.57
Condition
COPD (reference)	--	--	--	--
Chronic bronchitis	−3.0		−3.8	−4.4
Asthma
Model R²	.66	.64	.62	.57

Note: Only predictors significant at p<.20 shown. Regression parameters from final model are shown. Letters indicate significance level of variable in multiple regression models:

= p<.05.

=p<.01.

=p<.001.

=p<.0001