Table 4.

Predictors of Physical Health Summary Scores for SF-36

Predictor	B	SE of B	β	t	P
Constant	91.98	7.55		12.06	<0.0001
Fatigue	−2.66	0.49	−0.36	−5.48	<0.0001
Functional Class	−4.98	1.45	−0.22	−3.44	0.001
Oxygen use	−7.58	2.61	−0.16	−2.90	0.004
Dizziness	−1.67	0.54	−0.19	−3.09	0.002
Age	−0.20	0.08	−0.13	−2.63	0.010
Gender	8.71	3.49	0.13	2.50	0.014
Raynaud’s phenomenon	−0.95	0.42	−0.12	−2.26	0.026