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Updated: Mar 7, 2026

Measurements of Motor Function and Other Clinical Outcome Parameters in Ambulant Children with Duchenne Muscular Dystrophy
Published on: January 12, 2019
Longitudinal course of lung function in myotonic dystrophy type 1
Catherine Thil1, Nelly Agrinier2, Bruno Chenuel1
1Department of Pulmonary Function Testing and Exercise Physiology, CHRU Nancy, Nancy, F-54000, France.
Introduction:
Quality of life and prognosis among patients with myotonic dystrophy type 1 (DM1) depend on the degree of respiratory impairment. However, the changes over time in pulmonary function in DM1 have not been clearly described.
Methods:
We retrospectively reviewed pulmonary function tests of 80 DM1 patients followed for at least 5 years.
Results:
During 9.02 ± 3.4 years of follow-up, the average annual changes were: forced vital capacity (FVC) -0.034 ± 0.06 L (-0.72 ± 1.7% predicted); forced expiratory volume in 1 second (FEV1 ) -0.043 ± 0.05 L (-1.07 ± 1.7% predicted); and total lung capacity (TLC) -0.047 ± 0.1 L (-1.15 ± 1.7% predicted).
Conclusions:
These results suggest that, compared with other neuromuscular disorders, DM1 is, overall, associated with slowly progressive impairment of lung function. Muscle Nerve 56: 816-818, 2017.
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