Dysport® Adult Upper Limb Spasticity Extension Study

A TEAE was reported as emergent if it arose (i.e. started or worsened in severity) in the treatment phase after the subject received study medication. Adverse events of special interest (AESIs) were identified as those assessed as being due to remote spread of effect of Dysport®, or any adverse event (AE) that was assessed as a hypersensitivity reaction. TEAEs, AESIs, severe TEAEs, serious adverse events (SAEs), treatment related TEAEs, TEAEs leading to withdrawal and fatal SAEs are summarised by treatment cycle.

Systolic and diastolic BP were recorded at screening, baseline and at each post baseline visit. Vital signs were measured with the subject in a sitting position after resting for 3 minutes. Outcome measure is reported for number of subjects with data available for analysis.

HR was recorded at screening, baseline and at each post baseline visit. Vital signs were measured with the subject in a sitting position after resting for 3 minutes. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for RBC count were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for haemoglobin and MCHC were taken at baseline, at post treatment follow up visit Week 4, and at the end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for haematocrit were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for MCH were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for MCV were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for WBC count with differentials (neutrophils, lymphocytes) and platelet count were taken at baseline, at post treatment follow up visit Week 4, and at end of study or early withdrawal.

12-lead ECG tracing was performed at baseline, post treatment at Week 4 and at the end of study/early withdrawal visit. The 12-lead ECG recordings were performed at a paper speed of 25 mm/s, recorded with the subject in a supine position after 5 minutes rest. The ECG parameters reported were QRS duration, PR duration, QT duration, QTcB (QT interval corrected for HR according to Bazett), and QTcF (QT interval corrected for HR according to Fridericia) at baseline and the change to end of study/early withdrawal visit (EOS).

Blood samples for analysis of the following clinical chemistry parameters: ALP, GGT, SGOT and SGPT were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for clinical chemistry analysis of total bilirubin and creatinine were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal. Outcome measure is reported for number of subjects with data available for analysis.

Blood samples for analysis of BUN and fasting blood glucose levels were taken at baseline, at post treatment follow up visit Week 4, and at end of study/early withdrawal.

HR was measured by 12-lead ECG tracing, performed at baseline, at post treatment follow up visit Week 4, and at the end of study or early withdrawal visit. The 12-lead ECG recordings were performed at a paper speed of 25 mm/s, recorded with the subject in a supine position after 5 minutes rest.

Blood samples were collected at baseline, Week 4 of each cycle, and at the end of study/early withdrawal to test for the presence of Botulinum Toxin A Binding antibodies. Samples positive for the presence of binding antibodies were then analysed for the presence of neutralising putative antibodies. The number of subjects who were either positive (+ve) or negative (-ve) at baseline and then positive post baseline for binding or neutralising antibodies were reported.

The clinical assessment of muscle tone was performed using the MAS. The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The mean changes from baseline to Week 4 in MAS in the overall PTMG (finger, wrist or elbow flexors) are reported.

The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The percentage of subjects with at least a 1 grade reduction and at least a 2 grades reduction from baseline in mean MAS in the overall PTMG at Week 4 are reported.

The clinical assessment of muscle tone was performed using the MAS. The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The mean changes from baseline to Week 4 in MAS in the extrinsic finger flexors are reported.

The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The percentage of subjects with at least a 1 grade reduction and at least a 2 grades reduction from baseline in mean MAS in the extrinsic finger flexors at Week 4 are reported.

The clinical assessment of muscle tone was performed using the MAS. The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The mean changes from baseline to Week 4 in MAS in the wrist flexors are reported.

The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The percentage of subjects with at least a 1 grade reduction and at least a 2 grades reduction in mean MAS in the wrist flexors at Week 4 are reported.

The clinical assessment of muscle tone was performed using the MAS. The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The mean changes from baseline to Week 4 in MAS in the elbow flexors are reported.

The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The percentage of subjects at least a 1 grade reduction and at least a 2 grades reduction from baseline in mean MAS in the elbow flexors at Week 4 are reported.

The clinical assessment of muscle tone was performed using the MAS. The MAS consists of 6 grades: 0, 1, 1+, 2, 3, or 4 that can be applied to muscles of both the upper and lower limbs. The MAS was applied by the rater by stretching the joint through its full available range over 1 second. The mean changes from baseline to Week 4 in MAS in the shoulder extensors are reported.

The PGA is a 9-point rating scale: -4=markedly worse, -3=much worse, -2=worse, -1=slightly worse, 0=no change, +1=slightly improved, +2=improved, +3=much improved, +4=markedly improved. An assessment of overall treatment response was conducted by the investigator and the mean PGA scores during long-term open label treatment with Dysport were reported.

At baseline the subject and investigator together selected one of the four DAS domains as the PTT. The selected domain was required to have a rating of moderate or severe (≥2) at baseline. The DAS is a 4-point scale, the extent of functional impairment in 4 functional domains (dressing, hygiene, limb position and pain) was rated as follows: 0=no disability, 1=mild disability (noticeable but does not interfere significantly with normal activities), 2=moderate disability (normal activities require increased effort and/or assistance) and 3=severe disability (normal activities limited). The mean changes in DAS at Week 4 are reported.

At baseline the subject and investigator together selected one of the four DAS domains as the PTT. The selected domain was required to have a rating of moderate or severe (≥2) at baseline. The DAS is a 4-point scale, the extent of functional impairment in 4 functional domains (dressing, hygiene, limb position and pain) was rated as follows: 0=no disability, 1=mild disability (noticeable but does not interfere significantly with normal activities), 2=moderate disability (normal activities require increased effort and/or assistance) and 3=severe disability (normal activities limited). The percentage of subjects with at least 1 grade reduction from baseline in DAS for PTT at Week 4 are reported.

The DAS is a 4-point scale. The extent of functional impairment in 4 functional domains (dressing, hygiene, limb position and pain) was rated as follows: 0=no disability, 1=mild disability (noticeable but does not interfere significantly with normal activities), 2=moderate disability (normal activities require increased effort and/or assistance) and 3=severe disability (normal activities limited). The percentage of subjects with at least one grade reduction in DAS for each of the individual domains at Week 4 is reported.

The Tardieu Scale (TS) was used to measure spasticity in extrinsic finger flexors. The TS is administered by applying passive stretch to a muscle group at two velocities. Slow speed of muscle stretch measures the range of passive motion. During a slow stretching movement, the examiner determines the angle of movement arrest, either due to subject discomfort or a mechanical resistance. The same movement is repeated at high velocity (as fast as possible) to determine the angle of catch and release. The angle of movement arrest at slow velocity (XV1) and the angle of catch at fast speed (XV3) were recorded. The spasticity angle (X) was calculated as the difference between XV1 and XV3. Mean changes in Angles XV1, XV3 and X from baseline to Week 4 are reported.

The TS was used to measure spasticity in extrinsic finger flexors. The TS is administered by applying passive stretch to a muscle group. The spasticity grade (Y) assesses quality of muscle reaction on a 5-point scale (measured at fast speed): 0 =No resistance throughout passive movement, 1=slight resistance throughout passive movement, 2=clear catch at precise angle, interrupting passive movement, followed by release, 3=fatigable clonus (less than 10 seconds when maintaining pressure) occurring at a precise angle, followed by release. 4=unfatigable clonus (more than 10 seconds when maintaining pressure) occurring at precise angle. Mean changes in spasticity grade (Y) from baseline to Week 4 are reported.

The TS was used to measure spasticity in elbow flexors. The TS is administered by applying passive stretch to a muscle group at two velocities. Slow speed of muscle stretch measures the range of passive motion. During a slow stretching movement, the examiner determines the angle of movement arrest, either due to subject discomfort or a mechanical resistance. The same movement is repeated at high velocity (as fast as possible) to determine the angle of catch and release. The angle of movement arrest at slow velocity (XV1) and the angle of catch at fast speed (XV3) were recorded. The spasticity angle (X) was calculated as the difference between XV1 and XV3. Mean changes in Angles XV1, XV3 and X from baseline to Week 4 are reported.

The TS was used to measure spasticity in elbow flexors.The TS is administered by applying passive stretch to a muscle group. The spasticity grade (Y) assesses quality of muscle reaction on a 5-point scale (measured at fast speed): 0 =No resistance throughout passive movement, 1=slight resistance throughout passive movement, 2=clear catch at precise angle, interrupting passive movement, followed by release, 3=fatigable clonus (less than 10 seconds when maintaining pressure) occurring at a precise angle, followed by release. 4=unfatigable clonus (more than 10 seconds when maintaining pressure) occurring at precise angle. Mean changes in spasticity grade (Y) from baseline to Week 4 are reported.

The TS was used to measure spasticity in wrist flexors. The TS is administered by applying passive stretch to a muscle group at two velocities. Slow speed of muscle stretch measures the range of passive motion. During a slow stretching movement, the examiner determines the angle of movement arrest, either due to subject discomfort or a mechanical resistance. The same movement is repeated at high velocity (as fast as possible) to determine the angle of catch and release. The angle of movement arrest at slow velocity (XV1) and the angle of catch at fast speed (XV3) were recorded. The spasticity angle (X) was calculated as the difference between XV1 and XV3. Mean changes in Angles XV1, XV3 and X from baseline to Week 4 are reported.

The TS was used to measure spasticity in wrist flexors. The TS is administered by applying passive stretch to a muscle group. The spasticity grade (Y) assesses quality of muscle reaction on a 5-point scale (measured at fast speed): 0 =No resistance throughout passive movement, 1=slight resistance throughout passive movement, 2=clear catch at precise angle, interrupting passive movement, followed by release, 3=fatigable clonus (less than 10 seconds when maintaining pressure) occurring at a precise angle, followed by release. 4=unfatigable clonus (more than 10 seconds when maintaining pressure) occurring at precise angle. Mean changes in spasticity grade (Y) from baseline to Week 4 are reported.

The TS was used to measure spasticity in shoulder extensors. The TS is administered by applying passive stretch to a muscle group at two velocities. Slow speed of muscle stretch measures the range of passive motion. During a slow stretching movement, the examiner determines the angle of movement arrest, either due to subject discomfort or a mechanical resistance. The same movement is repeated at high velocity (as fast as possible) to determine the angle of catch and release. The angle of movement arrest at slow velocity (XV1) and the angle of catch at fast speed (XV3) were recorded. The spasticity angle (X) was calculated as the difference between XV1 and XV3. Mean changes in Angles XV1, XV3 and X from baseline to Week 4 are reported.

The TS was used to measure spasticity in shoulder extensors. The TS is administered by applying passive stretch to a muscle group. The spasticity grade (Y) assesses quality of muscle reaction on a 5-point scale (measured at fast speed): 0 =No resistance throughout passive movement, 1=slight resistance throughout passive movement, 2=clear catch at precise angle, interrupting passive movement, followed by release, 3=fatigable clonus (less than 10 seconds when maintaining pressure) occurring at a precise angle, followed by release. 4=unfatigable clonus (more than 10 seconds when maintaining pressure) occurring at precise angle. Mean changes in spasticity grade (Y) from baseline to Week 4 are reported.

The AROM was assessed by the range of extension achieved by the subject moving each joint in the PTMGs (extrinsic finger flexors, elbow flexors and wrist flexors) without assistance. A goniometer was used for measurements in the elbow and wrist flexors but not for measurements in the extrinsic finger flexors. Mean changes in AROM in the 3 possible PTMGs from baseline to Week 4 are reported.

The ease of applying a splint was evaluated on a 6-point scale (0= no splint needed, -1= splint needed and applied with no difficulty, -2= splint needed and applied with mild difficulty, -3= splint needed and applied with moderate difficulty, -4= splint needed and applied with severe difficulty, -5= splint needed,but unable to apply). Mean change in ease of applying a splint from baseline to Week 4 was reported.

The MFS was used to measure upper limb active function. Each subject was video taped while performing specific tasks. The videos were sent to a central provider and were read and scored by two independent readers blinded to the timing of the video and to treatment. These central assessments were used for the analysis of efficacy endpoints. The MFS consists of 10 tasks asking the subject to reach, grasp, carry and release different objects of different sizes which subjects are likely to use in their daily life. Each of these tasks was rated on a 10 point scale ranging from no movement to normal movement; for each task, the score 5 is used to rate a task barely accomplished. Mean change in MFS from baseline to Week 4 was reported.

Subjects were asked to complete the SF-36 questionnaires prior to the study treatment at baseline and at the end of study/early withdrawal visit. The SF-36 is a generic non-preference based health status measure. This instrument assessed subject health across 8 variable dimensions, which are specific health domains such as physical functioning, social functioning and vitality. Each variable item score is coded and turned into a 0-100 scale where 0 indicates the worst and 100 indicates the best possible health state for both the Physical Component Summary (PCS) and Mental Component Summary (MCS) of the questionnaire. Baseline results and the change from baseline to end of study/early withdrawal for the PCS and MCS are reported.

Subjects were asked to complete the EQ-5D-5L QoL questionnaires prior to the study treatment at baseline and at the end of study/early withdrawal visit. The EQ-5D-5L index is a generic preference based measure of health related QoL producing utility scores that represent subject preferences for particular health states. This instrument rated subject health state looking at 5 specific dimensions such as mobility, self-care, usual activity, pain/discomfort and anxiety/depression and scored their general health state. Each dimension has 5 levels of severity (no problems, slight problems,moderate problems, severe problems and extreme problems). In addition, a visual analogue scale (VAS) ranging from 0 to 100 was also included for the patients to summarize their overall health status, where 0 is the worst and 100 the best possible health state. The mean values for each dimension and the VAS scores at baseline and at the end of-study /early withdrawal are reported.