Improvement in the Cutaneous Disease Activity of Patients with Dermatomyositis is Associated with a Better Quality of Life
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Background: Cutaneous dermatomyositis (DM) disease activity is associated with decreased quality of life.
Objectives: To assess if an improvement in quality of life, as measured by the Skindex-29 and patient-reported itch and pain on a 10-point visual analogue scale (VAS), correlated with an improvement in cutaneous DM disease activity.
Methods: Patients with a completed cutaneous DM disease area and severity index [Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI)] at two visits separated by at least 2 months were classified into responder (n = 15) and nonresponder (n = 30) groups according to the point change in the CDASI activity scores between visits. Responders had at least a four-point improvement in CDASI activity, indicating clinically relevant improvement.
Results: The change from baseline to the follow-up visit of the Skindex-29 subscale scores for the responders vs. the nonresponders were significantly different for emotions (P < 0·01), functioning (P < 0·01) and symptoms (P < 0·01). The change in VAS score between responders and nonresponders was also significant for itch (P = 0·01) and pain (P = 0·04). There was no significant difference between the groups in terms of disease subtype, sex, race, age, treatment for DM, smoking history or a history of malignancy within 5 years of a diagnosis of DM.
Conclusions: This is the first study to demonstrate that the quality of life of patients with DM improved as their cutaneous disease activity decreased.
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