Maugars et al identified prognostic factors for a patient with dermatomyositis or polymyositis. The authors are from Nantes University in France.
Prognostic factors associated with death for patients with either dermatomyositis or polymyositis:
(1) older age at onset (> 45 years)
(2) dysphonia
(3) pulmonary interstitial fibrosis
(4) asthenia-anorexia
(5) myalgia NOT the presenting symptom
(6) absence of dysphagia
Risk factor for dermatomyositis:
(2) cancer
Risk factor for polymyositis
(2) failure to improve muscle strength following therapy for 1 month (lack of weakness reversibility)
(3) myalgia NOT the presenting symptom
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Specialty: Immunology/Rheumatology