Patients with idiopathic inflammatory myositis showed active muscle involvement (median creatine kinase level, 4298 U per liter; interquartile range, 766 to 9305), whereas in patients with ...

The median duration of follow-up for the 1050 patients in the long-term survival trial was 7.7 years (interquartile range, 3.9 to 12.8), and the median duration of follow-up for those who survived ...