Abstract:
OBJECTIVE:We aimed to perform an observational study of age at loss of independent ambulation (LoA) and side-effect profiles associated with different glucocorticoid corticosteroid (GC) regimens in Duchenne muscular dystrophy (DMD). METHODS:We studied 340 participants in the Cooperative International Neuromuscular Research Group Duchenne Natural History Study (CINRG-DNHS). LoA was defined as continuous wheelchair use. Effects of prednisone or prednisolone (PRED)/deflazacort (DFZ), administration frequency, and dose were analyzed by time-varying Cox regression. Side-effect frequencies were compared using χ(2) test. RESULTS:Participants treated ≥1 year while ambulatory (n = 252/340) showed a 3-year median delay in LoA (p < 0.001). Fourteen different regimens were observed. Nondaily treatment was common for PRED (37%) and rare for DFZ (3%). DFZ was associated with later LoA than PRED (hazard ratio 0.294 ± 0.053 vs 0.490 ± 0.08, p = 0.003; 2-year difference in median LoA with daily administration, p < 0.001). Average dose was lower for daily PRED (0.56 mg/kg/d, 75% of recommended) than daily DFZ (0.75 mg/kg/d, 83% of recommended, p < 0.001). DFZ showed higher frequencies of growth delay (p < 0.001), cushingoid appearance (p = 0.002), and cataracts (p < 0.001), but not weight gain. CONCLUSIONS:Use of DFZ was associated with later LoA and increased frequency of side effects. Differences in standards of care and dosing complicate interpretation of this finding, but stratification by PRED/DFZ might be considered in clinical trials. This study emphasizes the necessity of a randomized, blinded trial of GC regimens in DMD. CLASSIFICATION OF EVIDENCE:This study provides Class IV evidence that GCs are effective in delaying LoA in patients with DMD.
journal_name
Neurologyjournal_title
Neurologyauthors
Bello L,Gordish-Dressman H,Morgenroth LP,Henricson EK,Duong T,Hoffman EP,Cnaan A,McDonald CM,CINRG Investigators.doi
10.1212/WNL.0000000000001950subject
Has Abstractpub_date
2015-09-22 00:00:00pages
1048-55issue
12eissn
0028-3878issn
1526-632Xpii
WNL.0000000000001950journal_volume
85pub_type
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