A Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of ABBV-3373 in Participants With Moderate to Severe Rheumatoid Arthritis (RA)
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ClinicalTrials.gov Identifier: NCT03823391 |
Recruitment Status :
Completed
First Posted : January 30, 2019
Results First Posted : July 19, 2021
Last Update Posted : July 19, 2021
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Condition or disease | Intervention/treatment | Phase |
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Rheumatoid Arthritis (RA) | Drug: ABBV-3373 Drug: Placebo for ABBV-3373 Drug: Adalimumab Drug: Placebo for adalimumab | Phase 2 |
This study consists of a 12-week double-blind active-controlled phase and a 12 week double-blind extension period.
In the active-controlled period of the first 12 weeks of treatment, participants are randomized to receive either ABBV-3373 100 mg intravenously (IV) every other week (EOW) or adalimumab 80 mg subcutaneously (SC) EOW according to a 2:1 ratio.
At Week 12, the administration of ABBV-3373 was to stop to assess the durability of the observed clinical effects up to 24 weeks. Participants randomized to ABBV-3373 were to receive placebo injections, whereas participants randomized into the adalimumab arm were to continue their 80 mg dosing.
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 48 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor) |
Primary Purpose: | Treatment |
Official Title: | A Randomized, Double-Blind, Double-Dummy, Active Controlled Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Efficacy of ABBV-3373 in Subjects With Moderate to Severe Rheumatoid Arthritis |
Actual Study Start Date : | March 27, 2019 |
Actual Primary Completion Date : | April 8, 2020 |
Actual Study Completion Date : | August 26, 2020 |

Arm | Intervention/treatment |
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Experimental: ABBV-3373 Followed by Placebo
Participants will be administered with 100 mg ABBV-3373 by intravenous infusion and placebo to adalimumab by subcutaneous injection every other week for 12 weeks. After 12 weeks, participants will receive placebo to adalimumab every other week until Week 22.
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Drug: ABBV-3373
ABBV-3373 is administered as intravenous (IV) infusion Drug: Placebo for adalimumab Placebo for adalimumab is administered as subcutaneous (SC) injection |
Experimental: Adalimumab
Participants will be administered with placebo to ABBV-3373 by intravenous infusion and 80 mg adalimumab by subcutaneous injection every other week for 12 weeks. After 12 weeks, participants will receive 80 mg adalimumab subcutaneously every other week until Week 22.
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Drug: Placebo for ABBV-3373
Placebo for ABBV-3373 is administered as IV infusion Drug: Adalimumab Adalimumab is administered as subcutaneous (SC) injection
Other Name: Humira |
- Change From Baseline to Week 12 in Disease Activity Score (DAS) 28 (C-reactive Protein [CRP]) [ Time Frame: Baseline and Week 12 ]The DAS28 (CRP) is a composite index used to assess rheumatoid arthritis disease activity, calculated based on the tender joint count (out of 28 evaluated joints), swollen joint count (out of 28 evaluated joints), Patient's Global Assessment of Disease Activity (measured on a visual analog scale [VAS] from 0-100 mm), and hsCRP (in mg/L). Scores on the DAS28 (CRP) range from 0.96 to approximately 10, where higher scores indicate more disease activity. A negative change from Baseline in DAS28 (CRP) indicates improvement in disease activity.
- Change From Baseline to Week 12 in Clinical Disease Activity Index (CDAI) [ Time Frame: Baseline and Week 12 ]The clinical disease activity index (CDAI) is a composite index for assessing disease activity based on the summation of the counts of tender joint count (out of 28 evaluated joints) and swollen joint count (out of 28 evaluated joints), Patient Global Assessment of Disease Activity and Physician Global Assessment of Disease Activity both measured on a VAS from 0 to 10 cm. The total CDAI score ranges from 0 to 76 with higher scores indicating higher disease activity. A negative change from Baseline indicates improvement in disease activity.
- Change From Baseline in Simplified Disease Activity Index (SDAI) [ Time Frame: Baseline and Week 12 ]The SDAI is the numerical sum of five outcome parameters: tender and swollen joint count (based on a 28-joint assessment), Patient Global Assessment of Disease Activity and Physician Global Assessment of Disease Activity both measured on a VAS from 0-10 cm and level of CRP (in mg/dL; normal < 1 mg/dL). The SDAI has a range from 0 to 86, with higher scores indicating higher disease activity. A negative change from Baseline indicates improvement in disease activity.
- Change From Baseline to Week 12 in DAS28 (Erythrocyte Sedimentation Rate [ESR]) [ Time Frame: Baseline and Week 12 ]The DAS28 (ESR) is a composite index used to assess rheumatoid arthritis disease activity, calculated based on the tender joint count (out of 28 evaluated joints), swollen joint count (out of 28 evaluated joints), Patient's Global Assessment of Disease Activity (measured on a VAS from 0-100 mm), and ESR (in mm/hr). Scores on the DAS28 (ESR) range from 0 to approximately 10, where higher scores indicate more disease activity. A negative change from Baseline indicates improvement in disease activity.
- Percentage of Participants Achieving Low Disease Activity (LDA) Based on DAS28 (CRP) at Week 12 [ Time Frame: Week 12 ]The DAS28 (CRP) is a composite index used to assess rheumatoid arthritis disease activity, calculated based on the tender joint count (out of 28 evaluated joints), swollen joint count (out of 28 evaluated joints), Patient's Global Assessment of Disease Activity (measured on a VAS from 0-100 mm), and hsCRP (in mg/L). Scores on the DAS28 (CRP) range from 0.96 to approximately 10, where higher scores indicate more disease activity. A DAS28 (CRP) score less than or equal to 3.2 indicates low disease activity.
- Percentage of Participants With an American College of Rheumatology 50% (ACR50) Response at Week 12 [ Time Frame: Baseline and Week 12 ]
Participants who met the following 3 conditions for improvement from Baseline were classified as meeting the ACR50 response criteria:
- ≥ 50% improvement in 68-tender joint count;
- ≥ 50% improvement in 66-swollen joint count; and
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≥ 50% improvement in at least 3 of the 5 following parameters:
- Physician global assessment of disease activity
- Patient global assessment of disease activity
- Patient assessment of pain
- Health Assessment Questionnaire - Disability Index (HAQ-DI)
- High-sensitivity C-reactive protein (hsCRP).

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 18 Years to 75 Years (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Participant has the clinical diagnosis of RA for > 3 months based on the 1987 American College of Rheumatology (ACR) classification criteria or 2010 ACR/European League against Rheumatism (EULAR) criteria.
- Participant meets the following disease activity criteria: >= 4 swollen joints (based on 28 joint count) and >= 4 tender joints (based on 28 joint count) at Screening and Baseline visits and disease activity score (28 joints) (DAS28) C-reactive protein (CRP) >= 3.2 at Screening.
- Participant has an incomplete response to methotrexate. Participants must have been on oral or parental MTX therapy >= 3 months and on a stable prescription of 15 to 25 mg/week (or >= 10 mg/week in participants intolerant of MTX at doses >= 15 mg/week) for >= 4 weeks prior to the first dose of study drug. Participant must be expected to be able to continue on stable dose of MTX for the duration of study participation.
Exclusion Criteria:
- Participants previously exposed to adalimumab or other anti-tumor necrosis factor (TNF) biologics.
- Participants previously exposed to non-anti-TNF biologics or targeted synthetic disease-modifying antirheumatic drugs (DMARDs) for RA, with exception of participants exposed for less than 3 months and terminated not due to lack of efficacy or intolerability.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03823391

Study Director: | AbbVie Inc. | AbbVie |
Documents provided by AbbVie:
Responsible Party: | AbbVie |
ClinicalTrials.gov Identifier: | NCT03823391 |
Other Study ID Numbers: |
M16-560 2018-003053-21 ( EudraCT Number ) |
First Posted: | January 30, 2019 Key Record Dates |
Results First Posted: | July 19, 2021 |
Last Update Posted: | July 19, 2021 |
Last Verified: | June 2021 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | Yes |
Plan Description: | AbbVie is committed to responsible data sharing regarding the clinical trials we sponsor. This includes access to anonymized, individual and trial-level data (analysis data sets), as well as other information (e.g., protocols and clinical study reports), as long as the trials are not part of an ongoing or planned regulatory submission. This includes requests for clinical trial data for unlicensed products and indications. |
Supporting Materials: |
Study Protocol Statistical Analysis Plan (SAP) Clinical Study Report (CSR) |
Time Frame: | Data requests can be submitted at any time and the data will be accessible for 12 months, with possible extensions considered. |
Access Criteria: | Access to this clinical trial data can be requested by any qualified researchers who engage in rigorous, independent scientific research, and will be provided following review and approval of a research proposal and Statistical Analysis Plan (SAP) and execution of a Data Sharing Agreement (DSA). For more information on the process, or to submit a request, visit the following link. |
URL: | https://www.abbvie.com/our-science/clinical-trials/clinical-trials-data-and-information-sharing/data-and-information-sharing-with-qualified-researchers.html |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | Yes |
Rheumatoid Arthritis (RA) ABBV-3373 Adalimumab |
Arthritis Arthritis, Rheumatoid Joint Diseases Musculoskeletal Diseases Rheumatic Diseases Connective Tissue Diseases |
Autoimmune Diseases Immune System Diseases Adalimumab Anti-Inflammatory Agents Antirheumatic Agents |