Tabalumab

ACR20 Responder Index: Composite of clinical, laboratory, and functional measures of rheumatoid arthritis. ACR20 Responder: had \>=20% improvement from baseline in both 68 tender and 66 swollen joint counts and \>=20% improvement in at least 3 of 5 criteria: participant's and physician's global assessment of disease activity, Health Assessment Questionnaire-Disability Index (HAQ-DI) (which measured participants' perceived degree of difficulty performing daily activities), joint pain, and C-reactive protein (CRP). Percentage of participants achieving ACR20 response=(number of ACR20 responders/number of participants treated)\*100. All non-responders at Week 16 as well as all participants who discontinued study treatment at any time, for any reason, were defined as non-responders starting at that timepoint and going forward, including Week 24 endpoint.

Percentage of participants with a ≥ 5 point reduction from baseline in SELENA SLEDAI score, and no worsening (increase of \< 0.30 points from baseline) in PGA, and no new BILAG A organ domain score or 2 new BILAG B organ domain scores compared with baseline. SELENA SLEDAI is calculated from 24 individual descriptors across 9 organ systems; 0 indicates inactive disease and the maximum theoretical score is 105; scores \> 20 are rare. PGA is a visual analog scale scored from 0 to 3 (0=none, 1=mild, 2=moderate, 3=severe). BILAG uses a single score for each of the 9 organ domains; range is from severe (A) to no disease (E). Participants who were unable to comply with allowed concomitant medications requirements were considered non-responders, as were participants who dropped out or were missing Week 52 data.

PFS is defined as the time from date of first dose to the first observation of disease progression or death due to any cause. If a participant does not have a complete baseline disease assessment, then the PFS time is censored at the enrollment date, regardless of whether or not objectively determined disease progression (Increase of \> 25% from lowest response in serum M component, urine M component, bone marrow plasma cell percentage, development of bone lesions) or death has been observed for the participant. If a participant is not known to have died or have objective progression as of the data inclusion cutoff date for the analysis, the PFS time is censored at the last complete objective progression-free disease assessment date.

The PRA value is calculated and expressed as a percentage, which can range from 0 % to 100%. The value represents a summation of the total HLA antibody burden that the participant has and how frequently those HLA antigens appear in organ donor population. A calculated PRA of 20% means the participant has antibodies that represent an antigen frequency that exists in approximately 20% of the population.

The PRA value is calculated and expressed as a percentage, which can range from 0% to 100%. The value represents a summation of the total HLA antibody burden that the participant has and how frequently those HLA antigens appear in organ donor population. A calculated PRA of 20% means the participant has antibodies that represent an antigen frequency that exists in approximately 20% of the population. PRA scores were transformed using the arcsine function, which enables a skewed distribution of data typically expressed as proportions to achieve properties closer to a normal distribution. The range of possible arcsine transformed PRA scores is 0 (when PRA = 0) to approximately 1.57 (when PRA =100). Higher scores indicate the participant has antibodies against HLA antigens that appear frequently in the organ donor population.

Lesions were measured using Gd-enhancing T1-weighted MRI scans. The number of T1-weighted lesions per scan was obtained from the number of T1-weighted lesions observed during a specified week divided by the number of scans performed that same week. To obtain the number of T1-weighted lesions per scan averaged during Weeks 12, 16, 20, and 24, the number of lesions per scan at each week was summed and then divided by the number of visits with non-missing lesion counts.

A TEAE started on or after the date and time of the first dose of study drug administered in this study, or started prior to the study drug administration but worsened after the study drug started. Clinically significant events were defined as SAEs and other non-serious adverse events (AEs). A summary of SAEs and other non-serious AEs is located in the Reported Adverse Events module. Participants were on treatment up to 48 weeks. If a participant completed 48 weeks of treatment, the post-study treatment follow-up started at the next visit, 4 weeks later (Week 52). If a participant discontinued treatment early \[early discontinuation (ED)\], the post-study treatment follow-up started immediately afterwards. Baseline was defined as Week 0 in this study \[which is equivalent to Week 24 of the participant's prior study: Study H9B-MC-BCDG (NCT00689728) or Study H9B-MC-BCDH (NCT00785928)\].

For each planned laboratory evaluation, the range of values to be reported as AEs, regardless of causality, was pre-specified. A summary of SAEs and other non-serious AEs regardless of causality is located in the Reported Adverse Events module. Baseline was defined as Week 0 in this study \[which is equivalent to Week 24 of the participant's prior study: Study H9B-MC-BCDG (NCT00689728) or Study H9B-MC-BCDH (NCT00785928)\].

ACR50 Responder Index is a composite of clinical, laboratory, and functional measures in rheumatoid arthritis. An ACR50 Responder is defined as a participant with \>50% improvement from baseline in both tender and swollen joint counts and in at least 3 of the following 5 criteria: physician global assessment, participant global assessment, functional ability measure (Health Assessment Questionnaire-Disability Index which measures participants' perceived degree of difficulty when performing various daily activities), visual analog pain scale, and erythrocyte sedimentation rate or C-reactive protein.

ACR50 Responder Index is a composite of clinical, laboratory, and functional measures in rheumatoid arthritis. ACR50 Responder is defined as a participant with greater than 50% improvement from baseline in both tender and swollen joint counts and in at least 3 of the following 5 criteria: physician global assessment, patient global assessment, functional ability measure (Health Assessment Questionnaire-Disability Index which measures participants' perceived degree of difficulty when performing various daily activities), visual analog pain scale, and erythrocyte sedimentation rate or C-reactive protein.

ACR Responder Index is a Composite of clinical, laboratory, and functional measures of rheumatoid arthritis (RA). ACR20 Responders: had ≥20% improvement from baseline in both tender and swollen joint counts and ≥20% improvement in at least 3 of 5 criteria: participant's and physician's global assessment of disease activity, Health Assessment Questionnaire-Disability Index (HAQ-DI) (which measured participants' perceived degree of difficulty performing daily activities), visual analog pain scale, and erythrocyte sedimentation rate (ESR) or C-reactive protein (CRP).

A summary of other non-serious AEs, and all SAE's, regardless of causality, is located in the Reported Adverse Events section.

Included are the number of participants who experienced SAEs and treatment-emergent other non-SAEs. A summary of SAEs and other non-SAEs, regardless of causality, is located in the Reported Adverse Events (AEs) module.

Clinically significant effects are defined as serious AEs (SAEs) and other non-serious AEs regardless of causality. A summary of SAEs and other non-serious AEs regardless of causality is located in the Reported Adverse Events module.