Quality of life as measured by the short-form 36 (SF-36) questionnaire in patients with early systemic sclerosis and undifferentiated connective tissue disease

Table 4 Correlations among clinic and laboratory features and PCS and MCS scores in UCTD patients

Clinical and laboratory features	PCS (rho; P)	MCS (rho; P)
Age	−0.03 (0.831)	0.08 (0.607)
Sex F	−0.02 (0.883)	0.223 (0.201)
Disease duration	0.166 (0.339)	0.199 (0.246)
History of arthritis	0.104 (0.561)	0.136 (0.433)
ESR >20 mm/h	−0.290 (0.085)	0.303 (0.070)
Gammaglobulins > 1.5 g/dl	−0.231 (0.823)	−0.178 (0.623)
C3 < 80 mg/dl or C4 < 15 mg/dl	−0.176 (0.454)	−0.234 (0.234)
Low DLCO (<80% of predicted)	−0.08 (0.720)	0.185 (0.446)
E/A ratio < 1	−0.10 (0.561)	0.061 (0.728)
HAQ-DI	−0.44 (0.070)	−0.060 (0.725)

PCS = physical component summary score; MCS = mental component summary score; ESR = erythrocyte sedimentation rate; DLCO = carbon monoxide lung diffusion; E/A ratio <1, inverted ratio between early (E)/late (atrial = A) ventricular filling velocity; HAQ-DI = Health assessment questionnaire–disability index.

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