Danish and French clinicians investigated the diagnostic and predictive value of the Myasthenia Gravis Activities of Daily Living (MG-ADL) scale for respiratory function in patients with myasthenia gravis:
- 70 adults with a confirmed diagnosis of myasthenia gravis took part in the study, which involved completing three functional scales (the MGC, the QMG, and the MG-ADL) and undergoing spirometry at the same time;
- 25 of the 70 were retested three years later,
- there was a very poor correlation between the spirometry results and the respiratory symptoms as described and incorporated in the MG-ADL.
The authors emphasise the need to rely more on spirometry than on functional scales such as the MG-ADL, which is considered more subjective.
