Efficacy and Safety of Belimumab in Patients With Active Lupus Nephritis

PERR is defined as urinary protein creatinine ratio <=0.7, estimated glomerular filtration rate (eGRF) was not more than 20 percent (%) below the pre-flare value or >=60 milliliters per minute per 1.73 square meter (mL/min/1.73m^2) and was not a treatment failure. Analysis was performed using a logistic regression model for the comparison between Belimumab and Placebo with covariates treatment group, induction regimen (CYC vs. MMF), race (Black vs. Non-Black), Baseline urine protein-creatinine ratio (uPCR), and Baseline eGFR. Modified Intent-to-treat (mITT) Population consisted of all randomized participants who received at least one dose of study treatment and were not excluded due to Good Clinical Practice (GCP) non-compliance. Percentage of participants with PERR at Week 104 has been presented.

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporarily associated with the use of a medicinal product, whether or not considered related to the medicinal product. A SAE is any untoward medical occurrence that, at any dose: resulting in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgment or all events of possible drug-induced liver injury with hyperbilirubinemia were categorized as SAE. Number of participants with AEs and SAEs have been reported.

An AESI is one of scientific and medical concern specific to the product, for which ongoing monitoring and rapid communication by investigator to sponsor can be appropriate. A summary of protocol defined AESIs include malignant neoplasms including and excluding non-melanoma skin cancer (NMSC), post-infusion systemic reactions (PISR), all infections of special interest (opportunistic infections [OI], Herpes Zoster [HZ], tuberculosis [TB], and sepsis), depression (including mood disorders and anxiety)/suicide/self-injury and deaths.

CRR is defined as urinary protein creatinine ratio <0.5, eGRF was not more than 10% below the pre-flare value or >=90 mL/min/1.73m^2 and was not a treatment failure. Analysis was performed using a logistic regression model for the comparison between Belimumab and Placebo with covariates of induction regimen (CYC vs. MMF), race (Black vs. Non-Black), Baseline uPCR and Baseline eGFR. Percentage of participants with CRR at Week 104 has been presented.

PERR is defined as urinary protein creatinine ratio <=0.7, eGRF was not more than 20% below the pre-flare value or >=60 mL/min/1.73m^2 and was not a treatment failure. Analysis was performed using a logistic regression model for the comparison between Belimumab and Placebo with covariates of induction regimen (CYC vs. MMF), race (Black vs. Non-Black), uPCR, and Baseline eGFR. Percentage of participants with PERR at Week 52 has been presented.

Events are defined as the first event experienced among the following: death, progression to end stage renal disease, doubling of serum creatinine from Baseline, renal worsening or renal-related treatment failure. Participants who discontinued randomized treatment, withdrew from the study, were lost to follow-up, or had a non renal-related treatment failure were censored. Participants who completed the 104-week treatment period were censored at the Week 104 visit. Time to event is defined as event date minus treatment start date plus one. Analysis was performed using Cox proportional hazards model for the comparison between Belimumab and Placebo adjusting for induction regimen, race, Baseline uPCR and Baseline eGFR. Number of participants with time to death or renal related event up to Week 104 has been presented.

ORR is defined with respect to reproducible responses that included CRR, partial RR (PRR) and non responder. CRR is reported when uPCR was <0.5, eGFR was not more than 10% below pre-flare GFR or within normal range and not a treatment failure. PRR is >=50% decrease from Baseline in uPCR and one of the following: value <1 if Baseline <=3, or value <3 if the Baseline was >3, eGFR not more than 10% below Baseline GFR or within normal range and not a treatment failure and not a CRR. Non responder is reported when neither CRR nor PRR criteria was met. Percentage of participants reporting CRR, PRR and non responders at Week 104 has been presented.

An AE is any untoward medical occurrence in a participant or clinical investigation participant, temporarily associated with the use of a medicinal product, whether or not considered related to the medicinal product. A SAE is any untoward medical occurrence that, at any dose: resulting in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect, any other situation according to medical or scientific judgment or all events of possible drug-induced liver injury with hyperbilirubinemia were categorized as SAE. Number of participants with on-treatment AEs and SAEs has been reported.

An AESI is one of scientific and medical concern specific to the product, for which ongoing monitoring and rapid communication by investigator to sponsor can be appropriate. A summary of protocol defined AESIs include malignant neoplasms including and excluding non-melanoma skin cancer (NMSC), post-infusion systemic reactions (PISR), all infections of special interest (opportunistic infections [OI], Herpes Zoster [HZ], tuberculosis [TB], and sepsis), depression (including mood disorders and anxiety)/suicide/self-injury and deaths. On-treatment data is displayed.