Table 5. Functional disability and QoL predictors in dcSSc patients.

	B	SE	β	p	95% CI (Factor B)
HAQ
Pain (VAS)	0,111	0.018	0.452	<0.001	0.076-0.145
Disease duration	0,013	0.005	0.193	0,009	0.003-0.023
DLCO	-0,006	0.002	-0.189	0,010	[-0.011-(-0.001)]
	Model 1 R2=0.25 (p<0.001); Model 2 R2=0.08 (p<0.001)
SHAQ
Pain (VAS)	0,077	0.016	0.372	<0.001	0.045-0.108
DLCO	-0,007	0.002	-0.247	0,002	[-0.011-(-0.003)]
	Model 1 R2=0.16 (p<0.001); Model 2 R2=0.06 (p=0.002)
DHI
Pain (VAS)	3,086	0.595	0.389	<0.001	1.910-4.263
mRSS	0,438	0.154	0.212	0,005	0.134-0.742
Disease duration	0,344	0.165	0.156	0,040	0.017-0.671
	Model 1 R2=0.18 (p<0.001); Model 2 R2=0.07 (p=0.002)
SF-36 PCS
Pain (VAS)	-3,768	0.685	-0.408	0,000	[-5.122-(-2.415)]
Age	-0,400	0.134	-0.221	0,003	[-0.665-(-0.135)]
FVC	0,290	0.111	0.195	0,010	0.071-0.509
	Model 1 R2=0.18 (p<0.001); Model 2 R2=0.09 (p<0.001)
SF-36 MCS
Pain (VAS)	-2,832	0.608	-0.370	0,000	[-4.035-(-1.629)]
	R2=0.14 (p<0.001)
QoL: Quality of life; dcSSc: Diffuse cutaneous systemic sclerosis; CI: Confidence interval; HAQ: Health Assessment Questionnaire; VAS: Visual Analog Scale; DLCO: Diffusing capacity for carbon monoxide; SHAQ: Scleroderma HAQ; DHI: Duruöz Hand Index; mRSS: Modified Rodnan skin score; SF-36: Short form 36; PCS: Physical Component Score; FVC: Forced vital capacity; MCS: Mental Component Score.