Efficacy and Tolerability of BAF312 in Patients With Polymyositis and Dermatomyositis

Preliminary clinical efficacy of BAF312 in patients with Polymyositis and dermatomyositis (PM/DM) using the International Myositis Assessment and Clinical Studies Group (IMACS) core set measures (including manual muscle testing, Physician's Global Activity Assessment (on a horizontal 10 cm visual analogue scale), Patient Global Activity Assessment (on a horizontal 10 cm visual analogue scale), Physical Function (Health Assessment Questionnaire), Muscle-associated Enzymes (CK, LDH, AST, ALT, aldolase) and Extra-Muscular Activity Assessment (Extra-muscular portion of Myositis Disease Activity Assessment Tool).

Biomarkers reflecting efficacy in reducing systemic inflammatory components of the disease using serum markers such as C-reactive protein (CRP)

Short Form (36) Health Survey. The SF-36 consists of eight scaled scores, which are the weighted sums of the questions in their section. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The lower the score the more disability. The higher the score the less disability i.e., a score of zero is equivalent to maximum disability.

Myositis Disease Activity Scores. This is a combined tool that captures the physician's assessment of disease activity of various organ systems via the MYOSITIS INTENTION TO TREAT ACTIVITY INDEX (MITAX) and via the MYOSITIS DISEASE ACTIVITY ASSESSMENT VISUAL ANALOGUE SCALES (MYOACT) It rates the physician's overall assessment of the ongoing current disease activity for various systems by drawing a vertical mark on the 10-cm line for each system according to the following scale: left end of line = no evidence of disease activity, midpoint of line = moderate disease activity, and right end of line = extreme or maximum disease activity.

Physician's overall assessment on a single 0-10 cm scale, where the higher score indicates higher disease activity.

Patient's overall assessment on a single 0-10 cm scale, where the higher score indicates higher disease activity.

Manual Muscle Testing - 8 (MMT-8): Assessment of designated muscles manually by scoring each muscle from 0 to 10 where 0 is no strength and 10 is maximum strength. MMT- 8 includes 7 bilateral muscles (potential score 0-70 x 2) and one unilateral (axial) muscle (0-10 x1) so the total score ranges from 0 to 150 (maximum) where higher score indicates more strength.

Health Assessment Questionnaire (HAQ): This questionnaire is a patient reported outcome (PRO) which is self-administered by the patient. It is used to assess disability and comprises various categories related to usual daily activities. The patients report the amount of difficulty they have in performing some of these activities. Each question asks on a scale ranging from 0 to 3 if the categories can be performed without any difficulty (scale 0) up to cannot be done at all (scale 3). The total score is derived from these sub-scores and ranges from 0 to 3 where higher HAQ indicates more disability.