Quality of life and acquired organ damage are intimately related to activity limitations in patients with systemic lupus erythematosus

Table 3 Predictors of HAQ. Factors predicting impaired high scores of HAQ among patients with elevated HAQ (Multiple Linear Regression Analysis); n = 117)

	B	SE B	BETA	P	R
Step 1
Constant	1.444	0.091
EQ5D	−1.285	0.143	−0.642	<0.001	−0.64
Step 2
Constant	1.132	0.106
SDI	0.099	0.021	0.334	<0.001	0.52
EQ5D	−1.054	0.140	−0.527	<0.001	−0.64
Excluded variables
Age					0.29
Well-being					0.41
Pain					0.36

Note: R² = 0.41 for Step 1, ΔR² = 0.10 for Step 2 (p < 0.001)
B is the regression coefficient, SE B the standard error of B, BETA is the standardized regression coefficient
r = Pearson correlation between independent variables and HAQ scores

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