. Author manuscript; available in PMC: 2014 May 23.

Published in final edited form as: Heart Lung. 2013 Sep 20;42(6):465–472. doi: 10.1016/j.hrtlng.2013.08.008

Table 4.

Results from hierarchical regression models predicting functioning and general health in MOS-36 (N = 596).

Predictors	Physical functioning in MOS-36			Social functioning in MOS-36			General health in MOS-36

	R²	R² change	Beta	R²	R² change	Beta	R²	R² change	Beta
Step 1^a	.044^*			.154^*			.038^*
Step 2; symptom cluster subgroup	.091^*	.047^*	−9.70^*	.144^*	.121^*	−25.82^*	.119^*	.081^*	−14.96^*
F equation	F_6,587 = 9.78, p = .0001			F_6,588 = 16.50, p = .0001			F_6,588 = 13.26, p = .0001
Step 2; dyspnea	.127^*	.083^*	−12.61^*	.128^*	.104^*	−22.58^*	.074^*	.035^*	−13.68^*
F equation	F_6,587 = 14.19, p = .0001			F_6,588 = 14.39, p = .0001			F_6,588 = 7.79, p = .0001
Step 2; anxiety	.058^*	.014^*	−5.19^*	.112^*	.088^*	−16.77^*	.065^*	.027^*	−8.45^*
F equation	F_6,587 = 6.82, p = .0001			F_6,588 = 12.33, p = .0001			F_6,588 = 6.81, p = .0001
Step 2; depression	.063^*	.019^*	−5.64^*	.139^*	.115^*	−19.05^*	.124^*	.086^*	−14.16^*
F equation	F_6,587 = 6.56, p = .0001			F_6,588 = 13.83, p = .0001			F_6,588 = 13.92, p = .0001
Step 2; fatigue	.065^*	.021^*	−15.03^*	.124^*	.100^*	−18.26^*	.051^*	.013^*	−13.58^*
F equation	F_6,587 = 16.50, p = .0001			F_6,587 = 9.78, p = .0001			F_6,588 = 5.24, p = .0001

All models in step 2 were analyzed separately.

FEV1, forced expiratory volume in 1 s; MOS-36, Medical Outcomes Study 36-Item Short Form Health Survey.

p value < .05.

Predictors in step 1 include age, gender, FEV1% predicted, education level, and economic status.