Survival is presented as median day of survival for each group. Survival is defined as time to death, tracheostomy or the initiation of permanent assisted ventilation (PAV).

Amyotrophic Lateral Sclerosis Functional Rating Scale, Revised (ALSFRS-R) is a quickly administered (five minute) ordinal rating scale used to determine patients' assessment of their capability and independence in 12 functional activities/questions. The 12 functional activities/questions are rated on a scale of 0 to 4 for a total scoring range of 0-48, with 48 representing optimal function. All 12 activities are relevant in ALS.

This outcome measure calculation is based on measurements every 8 weeks from the Baseline Visit up until one year.

Vital Capacity is measured as the percent predicted per subject based on age, gender, and height, and is performed as a Slow Vital Capacity.

This outcome measure calculation is based on measurements every 12 weeks from the Baseline Visit up until one year.

Hand-held Dynamometry (HHD) is used to evaluate muscle strength. Six proximal muscle groups were examined bilaterally in both upper and lower extremities (shoulder flexion, elbow flexion, elbow extension, hip flexion, knee flexion, and knee extension). In addition, wrist extension, first dorsal interosseous contraction and ankle dorsiflexion were measured bilaterally.

HHD analysis was performed using Percent Change from Baseline. Each subject's baseline strength value for each muscle group is considered 100%. During successive visits strength for each muscle group was measured using HHD and was calculated as a percentage of the initial baseline value recorded. Upper extremity and lower extremity values were calculated as the sum of all tests for that extremity to create one megascore for upper and one megascore for lower extremity muscles.

This outcome measure calculation is based on measurements every 12 weeks from the Baseline Visit up until one year.

The ALS-Specific Quality of Life Scale (ALSQOL). was developed, tested, and validated in subjects with ALS, and is not a health-related quality of life scale. The scale consists of 59 questions that ask about severity of the symptoms of ALS, mood and affect, intimacy, and social issues. Each question for the ALSQOL is scored from 0-10. With 59 questions, total score ranges from 0-590 with scores simply added, with 590 representing highest quality of life. However since 10 is maximally weighted towards negative values on some questions and positive values on others, the following questions must have results transposed (Simply reverse the scale, for instance 10=0 and 0=10) prior to analysis: 1-10, 11, 16, 19, 24, 26, 28, 32, 35, 36, 38, and 41. Optional items are 50, 53, 56, and 59. These questions are not included on any scale or in any quantitative analyses.

This outcome measure calculation is based on measurements every 12 weeks from the Baseline Visit up until one year.

Hand-held Dynamometry (HHD) is used to evaluate muscle strength. Six proximal muscle groups were examined bilaterally in both upper and lower extremities (shoulder flexion, elbow flexion, elbow extension, hip flexion, knee flexion, and knee extension). In addition, wrist extension, first dorsal interosseous contraction and ankle dorsiflexion were measured bilaterally.

HHD analysis was performed using Percent Change from Baseline. Each subject's baseline strength value for each muscle group is considered 100%. During successive visits strength for each muscle group was measured using HHD and was calculated as a percentage of the initial baseline value recorded. Upper extremity and lower extremity values were calculated as the sum of all tests for that extremity to create one megascore for upper and one megascore for lower extremity muscles.

This outcome measure calculation is based on measurements every 12 weeks from the Baseline Visit up until one year.