Baseline characteristics were balanced across the two groups. Patients were approximately 56 years of age, and two-thirds were female. About 48% of patients in each group had secondary progressive MS.
The baseline expanded disability status scale (EDSS) score was near 5.4 and one-third of patients were on a disease-modifying therapy
被験者の説明の一部として、
平均？でＥＤＳＳ（expanded disability status scale・機能障害の程度の指標)が、約5.4での方々が治験に参加されました、ということだと思います。
http://www.mdmag.com/conference-coverage/ms-paris-2017/ibudilast-significantly-slows-brain-atrophy-for-progressive-ms
の抜粋が下記です。
Baseline characteristics were balanced across the two groups. Patients were approximately 56 years of age, and two-thirds were female. About 48% of patients in each group had secondary progressive MS.
The baseline expanded disability status scale (EDSS) score was near 5.4 and one-third of patients were on a disease-modifying therapy