The Inflammatory Rasch-built Overall Disability Scale (I-RODS) is an instrument answered by the patient to assess overall disability through assessing activity and social participation limitations in patients with inflammatory neuropathies. It is a 24-item scale, with each item representing a common, daily activity. The patient assigns a score between 0 and 2 to each item as follows:

0 = impossible to perform

1. = performed with difficulty
2. = easily performed

The total raw score on the I-RODS (0-48 max) is transformed to a final score (0-100), with a lower score indicating worse outcomes. Here the outcome measure is the mean change between screening and week 24, as calculated from transformed total I-RODS score. A negative change between week 24 and screening, or a reduction in I-RODS score, indicates a worsening of the patient's perceived daily functioning, as measured by the I-RODS.

The Chronic Acquired Polyneuropathy Patient-Reported Index (CAP-PRI) is used to evaluate quality of life in patients with polyneuropathy. The scale consists of 15 items, resulting in a single-score with 4 life domains (physical, social, pain and emotional well-being). Each item assessed is scored 0-2 (0= not at all, 1 = a little bit, 2 = a lot). Max score possible is 30 with a higher score indicating worse outcomes.

This outcome measure was evaluated at screening and week 24 by determining the mean change between these two time points. A negative score would indicate an improvement as perceived by the participant.

The Treatment Satisfaction Questionnaire for Medication (TSQM) is used to assess the patient's treatment satisfaction with intravenous immune globulin (IVIg) compared to the use of subcutaneous immune globulin (SCIg). There are 14 items and the TSQM addresses four domains: effectiveness, side effects, convenience, and global satisfaction. Questions are scored from one (least satisfied) to five or seven (most satisfied), with the exception of item 4 relating to side effects (scored yes/no, 1 or 0, respectively). Item scores are summed to give four domain scores, which are in turn transformed to a scale of 0-100. Higher scores indicate higher treatment satisfaction.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "role limitations-physical" is shown, listed as the mean change between screening to 24 weeks.

The short form 36 (SF-36) measure health status of patients. Per Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "role limitations-emotional" is shown, listed as the mean change from screening to 24 weeks.

A negative value for this measure indicates a worsening of role limitations related to emotional health.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "energy/fatigue" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "emotional well-being" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "social functioning" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "pain" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "general health" is shown, listed as the mean change between screening and 24 weeks.

LMST is a discrete variable that tests muscle strength in upper and lower limbs. It is a sum of the strength of 16 muscle groups tested at a given time point. LMST is measured and reported in pounds (lbs). For this outcome measure, the mean change, in pounds, between screening and week 24 LMST is reported.

The T25-FW is a quantitative mobility and leg function performance test based on a timed 25-foot walk. A lower time indicates greater mobility and leg performance, thus suggesting better outcomes. Time is measured in seconds. This outcome is the mean change between timed 25 foot walk times between screening and week 24.

Race and Ethnicity were not collected from any participant.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to physical functioning is shown, listed as the mean change from screening to 24 weeks.

The Inflammatory Rasch-built Overall Disability Scale (I-RODS) is an instrument answered by the patient to assess overall disability through assessing activity and social participation limitations in patients with inflammatory neuropathies. It is a 24-item scale, with each item representing a common, daily activity. The patient assigns a score between 0 and 2 to each item as follows:

0 = impossible to perform

1. = performed with difficulty
2. = easily performed

The total raw score on the I-RODS (0-48 max) is transformed to a final score (0-100), with a lower score indicating worse outcomes. Here the outcome measure is the mean change between screening and week 24, as calculated from transformed total I-RODS score. A negative change between week 24 and screening, or a reduction in I-RODS score, indicates a worsening of the patient's perceived daily functioning, as measured by the I-RODS.

The Chronic Acquired Polyneuropathy Patient-Reported Index (CAP-PRI) is used to evaluate quality of life in patients with polyneuropathy. The scale consists of 15 items, resulting in a single-score with 4 life domains (physical, social, pain and emotional well-being). Each item assessed is scored 0-2 (0= not at all, 1 = a little bit, 2 = a lot). Max score possible is 30 with a higher score indicating worse outcomes.

This outcome measure was evaluated at screening and week 24 by determining the mean change between these two time points. A negative score would indicate an improvement as perceived by the participant.

The Treatment Satisfaction Questionnaire for Medication (TSQM) is used to assess the patient's treatment satisfaction with intravenous immune globulin (IVIg) compared to the use of subcutaneous immune globulin (SCIg). There are 14 items and the TSQM addresses four domains: effectiveness, side effects, convenience, and global satisfaction. Questions are scored from one (least satisfied) to five or seven (most satisfied), with the exception of item 4 relating to side effects (scored yes/no, 1 or 0, respectively). Item scores are summed to give four domain scores, which are in turn transformed to a scale of 0-100. Higher scores indicate higher treatment satisfaction.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "role limitations-physical" is shown, listed as the mean change between screening to 24 weeks.

The short form 36 (SF-36) measure health status of patients. Per Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "role limitations-emotional" is shown, listed as the mean change from screening to 24 weeks.

A negative value for this measure indicates a worsening of role limitations related to emotional health.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "energy/fatigue" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "emotional well-being" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "social functioning" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "pain" is shown, listed as the mean change between screening and 24 weeks.

The short form 36 (SF-36) is a health status profile designed to measure health status and outcomes of patients. Per the paper from Burholt and Nash (2011) scoring and domains are as follows:" The SF-36 is a 36 item scale, which measures eight domains of health status: physical functioning (10 items); physical role limitations (four items); bodily pain (two items); general health perceptions (five items); energy/vitality (four items); social functioning (two items); emotional role limitations (three items) and mental health (five items). A scoring algorithm is used to convert the raw scores into the eight dimensions listed above. The scores are transformed to range from zero where the respondent has the worst possible health to 100 where the respondent is in the best possible health." For this particular outcome measure, only the domain pertaining to "general health" is shown, listed as the mean change between screening and 24 weeks.

LMST is a discrete variable that tests muscle strength in upper and lower limbs. It is a sum of the strength of 16 muscle groups tested at a given time point. LMST is measured and reported in pounds (lbs). For this outcome measure, the mean change, in pounds, between screening and week 24 LMST is reported.

The T25-FW is a quantitative mobility and leg function performance test based on a timed 25-foot walk. A lower time indicates greater mobility and leg performance, thus suggesting better outcomes. Time is measured in seconds. This outcome is the mean change between timed 25 foot walk times between screening and week 24.