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Primary Immunodeficiency Diseases (PID)Phase 2/3NCT00546871

Comparison of Intravenous and Subcutaneous Administration of IGIV, 10% in Primary Immunodeficiency (PID) Subjects

A Phase 2/3 study testing Immune Globulin Intravenous (Human), 10% in people with Primary Immunodeficiency Diseases (PID), run by Baxalta now part of Shire at 9 sites in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

The purpose of this study is to evaluate the tolerability of IGIV, 10% given subcutaneously and the pharmacokinetics of immunoglobulin G (IgG) following subcutaneous (SC) treatment with IGIV, 10% in subjects with primary immunodeficiency (PID) disorders. Read more about this study

Who is it for?
Ages 24 months and older
Conditions the study is for
Primary Immunodeficiency Diseases (PID)
What is being tested?
Immune Globulin Intravenous (Human), 10%
Type of treatment
Injection or infusion
How many people
49 participants
Where
9 sitesUnited States
Study dates
3 Oct 2007to 1 Sep 2009
Phase
Phase 2/3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 24 months and older
  • All sexes
  • No healthy volunteers
  • Child, Adult, Older adult

Who may be able to join

  • Written informed consent obtained from either the subject or the subject's legally acceptable representative prior to any study-related procedures and study product administration
  • Diagnosis of a PID disorder as defined by World Health Organization criteria (IUIS Scientific Committee, Primary immunodeficiency diseases. Report of an IUIS Scientific Committee. Clin Exp Immunol. 1999) for which the subject has been receiving a regular regimen of IV immunoglobulin infusions every 21 ± 3 days or 28 ± 3 days or a regular SC immunoglobulin treatment at 1 to 2 week intervals over a period of at least 3 months pre-study at a dose of 300-800 mg/kg BW/4 weeks
  • Subjects are aged 2 years or older
  • Subjects have a serum trough level of IgG > 4.5 g/L at the last documented determination
  • A negative serum pregnancy test for any female subject who is of childbearing potential
  • Female subjects of childbearing potential agree to practice birth control measures for the duration of the study

Who cannot join

  • Subjects positive at enrollment for one or more of the following: Hepatitis B surface antigen (HBsAg), PCR for hepatitis C virus (HCV), PCR for human immunodeficiency virus (HIV) Type 1
  • Subjects with levels of alanine amino transferase (ALT) or aspartate amino transferase (AST) > 2.5 times the upper limit of normal for the testing laboratory
  • Subjects with neutropenia (defined as an absolute neutrophil count [ANC] <= 500/mm3)
  • Subjects with serum creatinine levels greater than 1.5 times the upper limit of normal for age and gender
  • Subjects with a malignancy other than adequately treated basal cell or squamous cell carcinoma of the skin or carcinoma in situ of the cervix
  • Subjects with a history of thrombotic episodes (deep vein thrombosis, myocardial infarction, cerebrovascular accident)
Show all 14Show fewer
  • Subjects with abnormal protein loss (protein losing enteropathy, nephritic syndrome, severe lung disease)
  • Subjects with anemia that would preclude phlebotomy for laboratory studies
  • Subjects who received any blood or blood product other than an IGIV, SC immunoglobulin, immune serum globulin (ISG) preparation, or albumin within the 6 months prior to study enrollment
  • Subjects with an ongoing history of hypersensitivity or persistent reactions (urticaria, breathing difficulty, severe hypotension, or anaphylaxis) following IGIV, SC immunoglobulin and/or ISG infusions
  • Subjects with IgA deficiency and known anti IgA antibodies
  • Subjects receiving antibiotic therapy for the treatment of infection within 7 days prior to enrollment
  • Subjects participating in another clinical study involving an investigational product or device within 28 days prior to study enrollment
  • Subjects with bleeding disorders or who are on anti-coagulation therapy

Trial locations and contacts

9 sites in 1 country.

9 sites in 1 country

United States9 sites
  • Study site

    Atlanta, Georgia

  • Study site

    Centennial, Colorado

  • Study site

    Cleveland, Ohio

  • Study site

    Dallas, Texas

  • Study site

    Durham, North Carolina

  • Study site

    Galveston, Texas

  • Study site

    Los Angeles, California

  • Study site

    Milwaukee, Wisconsin

  • Study site

    North Palm Beach, Florida

Other trials in United States

About this study

Official title: Tolerability and Pharmacokinetic Comparison of Immune Globulin Intravenous (Human) 10% (IGIV, 10%) Administered Intravenously or Subcutaneously in Subjects With Primary Immunodeficiency Diseases

The purpose of this study is to evaluate the tolerability of IGIV, 10% given subcutaneously and the pharmacokinetics of immunoglobulin G (IgG) following subcutaneous (SC) treatment with IGIV, 10% in subjects with primary immunodeficiency (PID) disorders.

Being tested
Immune Globulin Intravenous (Human), 10%
Medical subject headings
Primary Immunodeficiency Diseases

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Immune Globulin Intravenous (Human), 10%Drug

    Intravenous administration in Study Part 1, subcutaneous administration in Study Parts 2 and 3

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Ratio of Area Under the Concentration Curve (AUC 0-τ)/Week Following IV Administration to SC Administration of IGIV, 10% at an Adjusted/Individual Adapted Dose (Part 3b), Expressed as a Percentage

    Expressed as (AUC_SC/AUC_IV) * 100

    Measured: Week 12 (IV) and week 32 or 33 (SC)

  2. Bioavailability (Trough Levels) of IgG After Administration of IGIV, 10%, in Participants Aged 2 to <12 Years.

    Administration of IGIV, 10%: - Part 1 = IV administration (IV) - Parts 2, 3a, 3b = SC administration (SC)

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visits 1, and 5 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; and at the end-of-study evaluation

  3. Percentage of Participants in Full Safety Data Set (FSDS) Who Had Any Infusion for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of participants for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

  4. Percentage of Participants Naïve to SC Administration of Immunoglobulins (SNSC) Who Had Any Infusion for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped.

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of participants for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

  5. Percentage of Participants With Prior Experience With Subcutaneous Administration of Immunoglobulins (SESC) Who Had Any Infusion for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of participants for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

  6. Percentage of Infusions in FSDS for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of infusions for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

  7. Percentage of Infusions in SNSC for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of infusions for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

  8. Percentage of Infusions in SESC for Which the Infusion Rate Was Reduced and/or the Infusion Was Interrupted or Stopped

    Ability to tolerate IGIV, 10% administered IV or SC. Measured as the percentage of infusions for which the infusion rate was reduced at any infusion and/or the infusion was interrupted or stopped for (i) any reason and (ii) for tolerability concerns or AEs

    Measured: Throughout study (1 year and 9 months)

Secondary outcomes (35)
  1. Study Part 1 (IV): Maximum Plasma Concentration (C-max)

    Maximal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #3 starts) up to 28 days (+/-2 days) post-infusion.

  2. Study Part 1 (IV): Minimum Plasma Concentration (C-min)

    Minimal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #3 starts) up to 28 days (+/-2 days) post-infusion.

  3. Study Part 1 (IV): Weight-adjusted Clearance

    Computed as weight-adjusted dose divided by total AUC

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #3 starts) up to 28 days (+/-2 days) post-infusion.

  4. Study Part 1 (IV): Terminal Half-life

    Computed from the regression slope in the terminal phase of the model (the slope is biphasic). Terminal half life is the time it takes for the plasma concentration or the amount of immunoglobulin in the body to be reduced by 50%during the terminal phase.

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #3 starts) up to 28 days (+/-2 days) post-infusion.

  5. Study Part 2 (Subcutaneous (SC)): Maximum Plasma Concentration (C-max)

    Maximal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  6. Study Part 2 (SC): Time to Maximum Immune Globulin Concentration (T-max)

    Time to reach C-max

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  7. Study Part 2 (SC): Minimum Plasma Concentration (C-min)

    Minimal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  8. Study Part 2 (SC): Weight-adjusted Clearance

    Computed as weight-adjusted dose divided by total AUC

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  9. Study Part 3B: Maximum Plasma Concentration (C-max)

    Maximal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  10. Study Part 3B: Time to Maximum Immune Globulin Concentration (T-max)

    Time to reach C-max

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  11. Study Part 3B: Minimum Plasma Concentration (C-min)

    Minimal immune globulin concentration after infusion

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  12. Study Part 3B: Area Under the Curve (AUC)

    The AUC between adjacent infusions was calculated by the trapezoidal rule. Linear interpolation/extrapolation was used to calculate the AUC for the exact duration of the infusion intervals (21 or 28 days for IV administration and 7 days for SC administration). To allow for comparisons between Study Parts 1, 2 and 3b, AUC(0-τ) was standardized for the infusion intervals (3 or 4 weeks vs. 1 week).

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  13. Study Part 3B: Weight-adjusted Clearance

    Computed as weight-adjusted dose divided by total AUC

    Measured: Pharmacokinetic evaluations: 60 minutes pre-infusion (before infusion #8 starts) up to 7 days (+/-1 day) post-infusion.

  14. Trough Levels of IgG After Administration of IGIV, 10%, in Participants 12 Years and Older

    Part 1: IgG trough levels measured at each IV infusion day (every 3rd or 4th week depending on schedule/frequency of participants for a total of 12 weeks) Part 2: IgG trough levels measured at weeks 1, 5 and 9 (of a total of 12 weeks) Part 3a: IgG trough levels measured at weeks 1 and 5 (of a total of 6 weeks) Part 3b: IgG trough levels measured at weeks 1, 5, 9 and 12 (of a total of 12 weeks)

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visits 1, and 5 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; and at the end-of-study evaluation

  15. Trough Levels of Antibody to Haemophilus Influenzae In All Study Participants

    Trough levels for IV and SC Treatment in Study Parts 1, 2, 3a and 3b.

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visit 1 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; at Visit 1 in the Study Extension Part; and at the end-of-study evaluation

  16. Trough Levels of Antibody to Hepatitis B in All Study Participants

    Trough levels for IV and SC Treatment in Study Parts 1, 2, 3a and 3b.

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visit 1 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; at Visit 1 in the Study Extension Part; and at the end-of-study evaluation

  17. Trough Levels of Antibody to Tetanus In All Study Participants

    Trough levels for IV and SC Treatment in Study Parts 1, 2, 3a and 3b.

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visit 1 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; at Visit 1 in the Study Extension Part; and at the end-of-study evaluation

  18. Number of Anti-Measles Antibody Titers That Were Below or Above the Protective Titer Level

    Antibody Titers That Were Below or Above the Protective Titer Level of >1:8 for IV and SC Treatment in Study Parts 1, 2, 3a and 3b. Participants had multiple anti-measles antibody titers measured during the study.

    Measured: Baseline; at each 3 or 4-week study visit in Study Part 1; at Visits 1, 5, and 9 in Study Part 2; at Visit 1 in Study Part 3a; at Visits 1, 5, and 9 in Study Part 3b; at Visit 1 in the Study Extension Part; and at the end-of-study evaluation

  19. Annual Infection Rates During Treatment

    Annual rate of all infections calculated using a Poisson model to account for different lengths of observation per subject using SAS V9.1.3 procedure GENMOD with allowance for overdispersion by deviance method. Point estimates and likelihood-ratio based 95% confidence intervals were provided. Infections as included in analysis comprised all reported AEs that were coded to the Medical Dictionary for Regulatory Activities (MedDRA) system organ class (SOC) of infections and infestations, described as an infection by investigator, or for which anti-infective medication was prescribed.

    Measured: Throughout the study, 1 year and 9 months

  20. Annual Rate of Acute Serious Bacterial Infections During IV and SC Treatment (FSDS)

    Annual rate of validated acute serious bacterial infections was calculated using a Poisson model to account for the different lengths of observation per subject using SAS V9.1.3 procedure GENMOD with an allowance for overdispersion by the deviance method.

    Measured: Throughout the study, 1 year and 9 months

  21. Rate of Temporally Associated AEs Per Infusion

    Rate of AEs per infusion defined as the total number of all AEs that begin during infusion or within 72 hours of completion of an infusion ("temporally associated") divided by the total number of infusions.

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

  22. AEs Deemed/Judged to be Related by the Investigator

    Rate of related AEs defined as the total number of AEs determined by the investigator to be related to the study drug that occur at any time during the study divided by the total number of infusions.

    Measured: Throughout the study period (1 year and 9 months)

  23. Frequency of Dose Adjustments (If IgG Trough Levels <4.5 g/L)

    Frequency of Dose Adjustments Based on IgG Trough Levels <4.5 g/L IgG, if Any, for Each Study Part. Defined/calculated as the number of participants requiring dose adjustments divided by the number of participants, for each respective data set.

    Measured: Throughout the study period (1 year and 9 months)

  24. Proportion of Participants Reporting ≥1 Temporally Associated Moderate or Severe AEs

    Proportion of Participants Reporting 1 or More Moderate or Severe AEs That Begin During Infusion or Within 72 Hours of Completion of an Infusion.

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

  25. Number of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (FSDS)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR

    Measured: Throughout entire study (1 year and 9 months)

  26. Rate of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (FSDS)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR Rate of AEs defined as the number of AEs categorized by MedDRA preferred terms, seriousness, severity, and causality divided by the number of infusions.

    Measured: Throughout entire study (1 year and 9 months)

  27. Number of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (SNSC -All Ages)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR

    Measured: Throughout entire study (1 year and 9 months)

  28. Rate of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (SNSC- All Ages)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR Rate of AEs defined as the number of AEs categorized by MedDRA preferred terms, seriousness, severity, and causality divided by the number of infusions.

    Measured: Throughout entire study (1 year and 9 months)

  29. Number of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (SESC)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR

    Measured: Throughout entire study (1 year and 9 months)

  30. Rate of All AEs Categorized by MedDRA Preferred Terms, Seriousness, Severity, and Causality (SESC)

    Seriousness and causality are abbreviated below as: Seriousness: Serious Adverse Event= SAE, non-Serious Adverse Event= non-SAE Causality: possibly or probably related= R, not related= NR Rate of AEs defined as the number of AEs categorized by MedDRA preferred terms, seriousness, severity, and causality divided by the number of infusions.

    Measured: Throughout entire study (1 year and 9 months)

  31. Percentage of Infusions Associated With ≥1 AE Related to the Study Drug

    Measured: Throughout the study period (1 year and 9 months)

  32. Percentage of Infusions Associated With ≥1 AEs That Begin During Infusion or Within 72 Hours of Completion of Infusion

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

  33. Percentage of Infusions Associated With ≥1 AE Excluding Infections That Begin During Infusion or Within 72 Hours of Completion of Infusion.

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

  34. Percentage of Infusions Associated With ≥1 Systemic AE Excluding Infections That Begin During Infusion or Within 72 Hours of Completion of Infusion.

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

  35. Percentage of Infusions Associated With ≥1 Local AE Excluding Infections That Begin During Infusion or Within 72 Hours of Completion of Infusion.

    Measured: During Infusion or Within 72 Hours of Completion of Infusions

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted19 Oct 2007 (estimated)
  2. Study start3 Oct 2007
  3. Primary completion1 Jul 2009
  4. Study completion1 Sep 2009

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2/3
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Parallel groups
Masking
None (open label)
Enrolment
49 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00546871
Sponsor's protocol ID
160601
Status last verified
Apr 2021
First submitted
18 Oct 2007
Last updated
19 May 2021
Data monitoring committee
No

Publications

  • Neu AM, Warady BA, Furth SL, Lederman HM, Fivush BA. Antibody levels to diphtheria, tetanus, and rubella in infants vaccinated while on PD: a Study of the Pediatric Peritoneal Dialysis Study Consortium. Adv Perit Dial. 1997;13:297-9.

    PubMed 9440877
  • Leibl H, Engl W, Melamed I, Stein M, Wasserman RL, Berger M, Schiff RI. IGIV-10% Infused Intravenously And Subcutaneously To Subjects With Primary Immunodeficiency Diseases - Comparison Of Pharmacokinetic Properties. Poster presentation at AAAAI 2009.

  • Schiff RI, Leibl H, Engl W. Pharmacokinetic properties of Gammagard Liquid 10% (KIOVIG) administered intravenously and subcutaneously to patients with primary immunodeficiency diseases. Clin Exp Immunol. 154 (Suppl. 1):132, 2008

  • Wasserman RL, Melamed I, Kobrynski L, Strausbaugh SD, Stein MR, Sharkhawy M, Engl W, Leibl H, Sobolevsky L, Gelmont D, Schiff RI, Grossman WJ. Efficacy, safety, and pharmacokinetics of a 10% liquid immune globulin preparation (GAMMAGARD LIQUID, 10%) administered subcutaneously in subjects with primary immunodeficiency disease. J Clin Immunol. 2011 Jun;31(3):323-31. doi: 10.1007/s10875-011-9512-z. Epub 2011 Mar 22.

    PubMed 21424824
  • Wasserman RL, Gupta S, Stein M, Rabbat CJ, Engl W, Leibl H, Yel L. Infection rates and tolerability of three different immunoglobulin administration modalities in patients with primary immunodeficiency diseases. Immunotherapy. 2022 Mar;14(4):215-224. doi: 10.2217/imt-2021-0256. Epub 2021 Dec 21.

    PubMed 34931880

Questions about this trial

What is this clinical trial studying?

A Phase 2/3 study testing Immune Globulin Intravenous (Human), 10% in people with Primary Immunodeficiency Diseases (PID), run by Baxalta now part of Shire at 9 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 19 May 2021. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 9 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this combined phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 23 Aug 2012). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Ratio of Area Under the Concentration Curve (AUC 0-τ)/Week Following IV Administration to SC Administration of IGIV, 10% at an Adjusted/Individual Adapted Dose (Part 3b), Expressed as a Percentage (time frame: Week 12 (IV) and week 32 or 33 (SC)). The study lists 8 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00546871, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 May 2021.

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