Table 6.

Hierarchical multiple linear regression analysis for predictors of Short Form 36 Physical Component Score (n=134)

	Beta	% Change in R²	Total R²	F
Block 1		18.7%^***
Age	−0.14^*
Sex	0.02
Hollingshead Score	−0.12
Co-morbidity Index	−0.21^**
Block 2		12.2^***
Chest pain frequency	−0.20^**
Block 3		12.1^***
Fatigue	−0.29^**
Dyspnea	−0.19^*
			43.0%	13.6^***
			Adjusted R² 39.8%

Note: Beta weights presented are those obtained at entry of the final block.

p < .05

^**

p < .01

^***

p < .001. Stepwise entry demonstrated that none of the symptom interaction terms significantly increased R² and thus did not enter the regression analysis.