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

OBJECTIVE To investigate health-related quality of life (HRQOL) in patients affected by early systemic sclerosis (eSSc) and to compare it with that of patients with undifferentiated connective tissue disease (UCTD). METHODS At baseline, 31 eSSc and 35 UCTD patients underwent clinical evaluation, laboratory investigations, nailfold videocapillaroscopy, echocardiography, and lung function tests. All patients and 40 controls, matched for sex and age completed the Short Form-36 (SF-36) questionnaire and the Health Assessment Questionnaire Disability Index (HAQ-DI). RESULTS SF-36 scores were significantly lower in eSSc and UCTD patients than in healthy controls as regards the following domains: physical component score (PCS), mental component score (MCS), physical functioning, role-physical, bodily pain, general health and mental health. PCS was negatively correlated to the HAQ-DI (rho -0.59; p=0.0004) and ESR >20 mm/h (rho -0.58; p=0.0006) in eSSc patients. No statistically significant correlation was found between PCS, MCS and HAQ-DI in UCTD patients. Age, sex, disease duration, history of arthritis, low levels of either C3 or C4, a low DLCO (carbon monoxide lung diffusion) and inversion of the E/A ratio were not correlated to PCS and MCS in either eSSc or UCTD patients. CONCLUSION Many eSSc or UCTD patients perceive they have an impaired quality of life in both physical and mental domains. This condition has to be taken into account by the clinicians involved in the care of these patients.