A Group Cognitive Behavioural Therapy Improves Quality of Life of Multiple Sclerosis Patients and Delays Disease Progression: A Multi-Centre Controlled Trial

Background: Multiple Sclerosis (MS) affects quality of life (QoL). Pharmacological treatments demonstrated benefits on clinical endpoints without improving QoL. We evaluated the effects of a group Cognitive Behavioural Therapy (CBT) on QoL disease progression. Methods: One-year multi-centre controlled multivariate-matched study was organised on Relapsing-Remitting MS (RRMS) patients with Expanded Disability Status Scale (EDSS) < 4, MS duration < 2 years, treated by interferon I? in 11 French centres. For each new patient, the two best-matching patients for age, gender, EDSS, mood, illness duration baseline variables were selected in the other centres. The self-filled Two Lives Scale (TLS)-QoL10 was used at months (M) 0-3-6-9-12-15; the post-baseline mean QoL was the endpoint. We compared CBT + I? to I? alone. The effect of disease progression on QoL was evaluated by modelling, for each visit, the effect of EDSS on QoL at later visits.Results: 19 + 32 patients were recruited. Compared to placebo, improvements of 1.10 (95%CI [0.31-1.89], p = 0.009) and 1.43*** [0.72, 2.15] were observed in the CBT group on QoL and coping scales, respectively. Coping explained 81%*** [57, 100] of the effect of CBT on QoL. QoL was negatively affected by disease progression (0.95*** [-1.21; 0.63]), whereas EDSS was influenced by QoL values (-0.10*** [-0.14; -0.06]).Conclusions: We observed a clinically significant beneficial effect of CBT on QoL, the effect of CBT essentially explained by an increase of coping, a positive influence of QoL on disease progression. QoL is both the most important target for patients and a factor of slowing disease progression.