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Research ArticlePsoriatic Arthritis
Open Access

Radiographic Progression Inhibition with Intravenous Golimumab in Psoriatic Arthritis: Week 24 Results of a Phase III, Randomized, Double-blind, Placebo-controlled Trial

Arthur Kavanaugh, M. Elaine Husni, Diane D. Harrison, Lilianne Kim, Kim Hung Lo, Lenore Noonan and Elizabeth C. Hsia
The Journal of Rheumatology June 2019, 46 (6) 595-602; DOI: https://doi.org/10.3899/jrheum.180681
Arthur Kavanaugh
From Internal Medicine — Rheumatology, University of California at San Diego, La Jolla, California; Department of Internal Medicine — Rheumatology, Cleveland Clinic, Cleveland, Ohio; Immunology, Janssen Research & Development LLC, Spring House, Pennsylvania; Rheumatology, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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M. Elaine Husni
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Diane D. Harrison
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Lilianne Kim
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Kim Hung Lo
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Lenore Noonan
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Elizabeth C. Hsia
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  • For correspondence: ehsia@its.jnj.com
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Abstract

Objective. Evaluate effects of intravenous (IV) golimumab (GOL) on radiographic progression in psoriatic arthritis (PsA).

Methods. This phase III, randomized, double-blind, placebo-controlled trial (GO-VIBRANT) randomized patients with active PsA to receive IV placebo (n = 239) or IV GOL 2 mg/kg (n = 241) at weeks 0, 4, 12, and 20. Radiographic progression (controlled secondary endpoint) was evaluated as change from baseline at Week 24 in PsA-modified total Sharp/van der Heijde scores (SvdH). The proportions of patients with a change from baseline at Week 24 in the total PsA-modified SvdH exceeding the smallest detectable change (SDC) or > 0 or 0.5 also were determined.

Results. Overall, 474 patients (237/arm) contributed radiographic data. Results obtained from the 2 blinded, independent radiographic readers demonstrated good agreement (total score intraclass correlation coefficients: baseline = 0.93, Week 24 = 0.92, Week 24 change score = 0.73). GOL demonstrated significant inhibition of radiographic progression relative to placebo from baseline to Week 24 (mean changes in PsA-modified total SvdH: −0.36 vs 1.95; treatment difference: −2.32; p < 0.001). At Week 24, smaller proportions of GOL- versus placebo-treated patients demonstrated an increase in the total PsA-modified SvdH score exceeding the SDC (8.0% vs 27.0%, respectively; difference: −19.0%; p < 0.001), > 0 (28.3% vs 57.0%, respectively; difference: −28.7%; p < 0.001), or > 0.5 (18.6% vs 41.8%, respectively; difference: −23.2%; p < 0.001). Results were consistent for erosion and joint space narrowing scores, in hands and feet, and in patients with/without baseline concomitant methotrexate use. Prevention of radiographic progression by GOL was independent of clinical response.

Conclusion. IV GOL is significantly better than placebo in inhibiting radiographic progression of structural damage in active PsA. [Clinical trial registration number (www.ClinicalTrials.gov): NCT02181673]

Key Indexing Terms:
  • PSORIATIC ARTHRITIS
  • BIOLOGICAL THERAPY
  • RADIOGRAPHY
  • TUMOR NECROSIS FACTOR INHIBITORS
  • DISEASE ACTIVITY

Psoriatic arthritis (PsA) is a chronic, inflammatory arthropathy that can affect the peripheral joints, axial skeleton, sacroiliac joints, and entheses, and is also associated with dactylitis and psoriatic nail and skin disease1. More than half of patients with PsA have radiographic evidence of erosions, and up to 40% of patients develop severe erosive arthropathy1,2.

The advent of biologic therapies that inhibit the activity of proinflammatory cytokines such as tumor necrosis factor-α (TNF-α) has significantly improved the ability to effectively treat many aspects of PsA3,4. Inhibition of TNF-α has been shown to induce rapid and significant improvement of arthritis and psoriasis in patients with active PsA while maintaining an acceptable safety profile5.

Golimumab (GOL) is a human TNF-α monoclonal antibody that is approved for the treatment of rheumatoid arthritis (RA), ankylosing spondylitis, and PsA6. GOL is the only anti-TNF therapy with both subcutaneous (SC) and intravenous (IV) formulations. SC GOL 50 mg demonstrated longterm clinical efficacy and inhibition of structural damage in the phase III GO-REVEAL trial of patients with moderate to severe PsA7,8. More recently, in the phase III GO-VIBRANT study of IV GOL in PsA, patients receiving IV GOL 2 mg/kg through 24 weeks had significantly greater improvements in PsA signs and symptoms and significantly less radiographic progression versus placebo-treated patients9. Given the importance of addressing radiographic damage in patients with PsA, this report provides greater clarity on radiographic findings from the large cohort of patients from the GO-VIBRANT GOL trial.

MATERIALS AND METHODS

Study conduct

GO-VIBRANT (Clinicaltrials.gov identifier: NCT02181673) was conducted according to the Declaration of Helsinki and Good Clinical Practice guidelines. Governing ethical bodies approved the study protocol, and patients provided written informed consent. Schulman IRB (now Advarra) provided centralized approvals for sites in the United States (reference no. 201404246) and Canada (reference no. 201404730).

Patients

Eligibility criteria for GO-VIBRANT have been published previously9. Briefly, participants were adults (≥ 18 yrs) with PsA for ≥ 6 months who met the ClASsification for Psoriatic ARthritis (CASPAR) criteria10 at screening. Patients had active PsA, defined as ≥ 5 of 66 swollen joints and ≥ 5 of 68 tender joints at screening and baseline, and high-sensitivity C-reactive protein (CRP) ≥ 0.6 mg/dl at screening, despite current or previous disease-modifying antirheumatic drugs (≥ 3 mos) and/or nonsteroidal antiinflammatory drugs (NSAID; ≥ 4 weeks) or demonstrated intolerance to these agents.

Participants could not have previously received biologic therapy. Continued stable use of methotrexate (MTX; ≤ 25 mg/week), low-dose oral corticosteroids (≤ 10 mg prednisone/day), and NSAID (usual approved marketed doses) was permitted as previously described9.

Randomization and blinding

Patient assignment to study treatment was accomplished with permuted block randomization (in a 1:1 ratio) stratified by geographic region and baseline MTX use through an interactive Web-based response system. Patients and investigators were blinded to treatment group assignment.

Study design

In the phase III, multicenter, randomized, double-blind, placebo-controlled GO-VIBRANT trial, patients received IV infusions over 30 ± 10 min of either placebo or GOL 2 mg/kg at weeks 0, 4, 12, and 20. Study visits were scheduled every 2–4 weeks through Week 24. Patients in either treatment group who demonstrated < 5% improvement in swollen and tender joint counts at Week 16 entered early escape, in which they were allowed one of the following changes to the standard-of-care, nonbiologic rescue medications at the discretion of the investigator: (1) increase in dose or initiation of low-dose corticosteroids (≤ 10 mg/day prednisone or equivalent), MTX (≤ 25 mg/week), or NSAID; or (2) initiation of sulfasalazine (≤ 3 g/day), hydroxychloroquine (≤ 400 mg/day), or leflunomide (≤ 20 mg/day).

Radiographic assessments

Single radiographs of the hands (posteroanterior) and feet (anteroposterior) were obtained at weeks 0 and 24 (or at the end of study if the patient discontinued prior to Week 24). They were read by 2 independent readers (and a third independent reader as an adjudicator in cases of a > 10-unit difference in total change score between readers or a missing total change score from one of the 2 primary readers) who were blinded to patient identity, treatment group, and assessment timepoint. Patients who entered early escape also had radiographs obtained at Week 16. Changes in radiographic damage were measured using the total Sharp/van der Heijde score (SvdH) with modifications for patients with PsA (i.e., inclusion of distal interphalangeal joints in the hands and pencil-in-cup and gross osteolysis deformities)11,12.

The total PsA-modified SvdH11,12 ranges from 0–528. It sums the erosion (0–320) and joint space narrowing (JSN; 0–208) scores for 40 and 12 joints of the hands and feet, respectively. For erosion severity, the surface area involved is scored from 0 (no erosion) to 5 (extensive loss of bone from more than half of the articulating bone). Both sides of foot joints are graded, yielding a maximum erosion score of 10 per foot joint. Severity of JSN is scored from 0 (no JSN) to 4 (complete loss of joint space, bony ankylosis, or complete luxation). Thus, higher scores and more positive change scores indicate more radiographic damage and more radiographic progression, respectively.

Statistical analysis

Change from baseline at Week 24 in the total PsA-modified SvdH was one of 4 major secondary study endpoints. Additional predefined radiographic endpoints included the following: (1) the proportions of patients and joints with no new erosion or no new JSN (among patients with ≥ 1 joint with a score of 0 at baseline and a corresponding non-missing score at the timepoint evaluated); (2) the proportions of patients with a change from baseline at Week 24 in the PsA-modified SvdH score > 0 or > 0.5; and (3) the proportion of patients with a change from baseline at Week 24 in the total PsA-modified SvdH score greater than its smallest detectable change (SDC).

To assess agreement between the 2 primary independent readers, changes from baseline at Week 24 in the PsA-modified SvdH total, erosion, and JSN scores were summarized by reader, and intraclass correlation (ICC) coefficients were determined for intrareader and interreader variability; ICC coefficients represented the percent of the total correlation within each patient’s variation between the 2 readers. Pencil-in-cup or gross osteolysis deformity assessments also were compared between readers.

The change in the total PsA-modified SvdH was evaluated for randomized patients who were treated and had a non-missing baseline score (full analysis set for structural damage analyses), representing a modified intent-to-treat analysis. Using data from patients contributing radiographic data at both Week 0 and Week 24 for the major secondary endpoint, multiple imputation methodology13 was used to impute Week 24 radiograph scores for patients with missing data and/or who early escaped at Week 16. Specifically, the linear regression imputation model was built using data from patients with baseline and Week 24 SvdH and included change from baseline to Week 24 in SvdH as the dependent variable and as covariates baseline SvdH, natural logarithm (CRP + 1), baseline MTX use (yes, no), and randomized treatment group. The model was fitted to derive the distribution of the coefficients, which was then used to predict the missing value.

Planned sensitivity analyses of the change in the total PsA-modified SvdH from baseline at Week 24 were conducted to evaluate alternative methods of handling missing data, including an ANOVA model on the van der Waerden normal scores with missing data imputed through linear extrapolation. The same ANOVA model was modified to exclude patients with missing Week 24 data (i.e., observed data only), to use linear extrapolation for Week 24 scores for all patients who early escaped at Week 16 and for missing data, and to use the last observation carried forward (LOCF) to impute Week 24 scores for all patients with missing Week 24 scores. A tipping point analysis with multiple imputation methodology was used to evaluate the deviation from missing-at-random assumptions for missing data.

In a posthoc evaluation, change in the total PsA-modified SvdH at Week 24 was compared between patients who did and did not achieve clinical response, defined by ≥ 20%, 50%, or 70% improvement in the American College of Rheumatology response criteria (ACR20, ACR50, ACR70, respectively)14, at Week 24. For radiographic endpoints other than the study’s major secondary endpoint, treatment group differences were analyzed using ANCOVA on the van der Waerden normal scores for continuous endpoints (missing data imputed by linear extrapolation) and Cochran-Mantel-Haenszel testing for dichotomous endpoints.

All statistical tests were stratified by baseline MTX use (yes, no) where feasible and performed at an α level of 0.05 (2-sided). A sample size of about 220 patients per treatment arm was estimated a priori to provide 90.7% power in detecting a significant treatment group difference in the mean change in total PsA-modified SvdH from baseline at Week 24.

RESULTS

Patient disposition and baseline characteristics

Patient disposition through Week 24 of GO-VIBRANT has been reported9. Briefly, data were collected from September 2014 to July 2016 at 90 sites in 11 European and North American countries. Among the 817 screened patients, 480 were randomized to IV placebo (n = 239) or IV GOL 2 mg/kg (n = 241). In total, 474 patients contributed data to structural damage analyses, including 237 patients each in the placebo and GOL groups with observed data at baseline and 215 and 231 patients, respectively, with observed data at Week 24.

Demographic and disease characteristics were generally well-balanced between the treatment groups, including baseline radiographic findings (Table 1).

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Table 1.

Baseline demographic and disease characteristics.

Reader agreement

Individual reader assessments of the change from baseline at Week 24 in the total PsA-modified SvdH, as well as in its component scores, were consistent with each other. For baseline and Week 24 PsA-modified SvdH, ICC coefficients for total (0.93 and 0.92, respectively), erosion (both 0.87), and JSN (both 0.96) scores indicated good agreement. For Week 24 change scores, the ICC coefficients were 0.73, 0.64, and 0.72 for total, erosion, and JSN scores, respectively. Across treatment groups, Reader 1 identified fewer patients with pencil-in-cup or gross osteolysis deformities than did Reader 2 at both baseline (13 vs 43 patients) and Week 24 (14 vs 45 patients). While Reader 1 generally read less damage than Reader 2, each reader was internally consistent, and changes from baseline were consistent between readers (also see Supplementary Table 1, available with the online version of this article).

PsA-modified SvdH through Week 24

Patients who received IV GOL 2 mg/kg exhibited significantly less radiographic progression than did placebo-treated patients (i.e., the respective mean changes from baseline at Week 24 in the PsA-modified SvdH were −0.36 vs 1.95, with a treatment difference of −2.32; p < 0.001; Table 2). The cumulative probability plot for total PsA-modified SvdH (Figure 1A) demonstrated clear separation between treatment groups, with greater inhibition of progression and fewer patients with progression among GOL- than placebo-treated patients.

Figure 1.
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Figure 1.

Cumulative probability plots of changes in total PsA-modified SvdH at Week 24 (full analysis set for structural damage endpoints) for (A*) all patients receiving IV treatment; (B) patients with MTX use at baseline; and (C) patients with no MTX use at baseline. *Panel A from Figure 2 of Kavanaugh A, et al. Safety and efficacy of intravenous golimumab in patients with active psoriatic arthritis: results through week twenty-four of the GO-VIBRANT study. Available from https://onlinelibrary.wiley.com/doi/full/10.1002/art.40226 and licensed under CC BY 2.0. IV: intravenous; MTX: methotrexate; PsA: psoriatic arthritis; SDC: smallest detectable change; SvdH and SHS: Sharp/van der Heijde score.

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Table 2.

Summary of change from baseline at Week 24 in PsA-modified SvdH (full analysis set for structural damage endpoints).

Results obtained from 5 planned sensitivity analyses (all p < 0.001) were consistent and supported the efficacy of IV GOL in inhibiting radiographic progression. Specifically, patients who received IV GOL 2 mg/kg exhibited significantly less radiographic progression than placebo-treated patients from baseline to Week 24 when evaluated with an ANOVA model on the van der Waerden normal scores using linear extrapolation to impute missing data (respective mean changes in SvdH: −0.38 vs 1.88; p < 0.001) and with the same ANOVA model but using only observed data (−0.39 vs 2.08; p < 0.001), linear extrapolation for Week 24 scores for all patients who early escaped at Week 16 and for missing data (−0.37 vs 1.79; p < 0.001), and LOCF methodology to impute Week 24 scores for all patients with missing Week 24 scores (−0.38 vs 1.88; p < 0.001). In a tipping point analysis, p values derived by pooling over 100 imputed samples using the standard error of the estimated difference for each combination of treatment shifts for imputed missing values were all < 0.001.

Additionally, subgroup analyses based on baseline demographics, disease characteristics, and concomitant therapy were consistent in favoring IV GOL over placebo in inhibiting radiographic progression. These variables included sex (male, female); age (< 65, ≥ 65 yrs); body mass index (< 25, ≥ 25 to < 30, ≥ 30 mg/kg2); PsA duration (< 1, ≥ 1 to < 3, ≥ 3 yrs); baseline numbers of swollen or tender joints (≥ 5 to < 10, ≥ 10 to < 15, ≥ 15); baseline CRP (< 1, ≥ 1 mg/dl); and baseline use (yes, no) of MTX (Figures 1B and 1C, Table 2), NSAID (Supplementary Figures 1A and 1B, available with the online version of this article; Table 2), and oral low-dose corticosteroids (Supplementary Figures 1C and 1D, available with the online version of this article; Table 2). Results also were consistent for component erosion and JSN scores, and for hands and feet (Table 2).

Change in the total PsA-modified SvdH in ACR responders versus nonresponders at Week 24

Differences in mean changes in radiographic progression from baseline to Week 24 observed between GOL- and placebo-treated patients were evident in both Week 24 ACR20 responders (−0.60 vs 1.08; p < 0.001) and nonresponders (0.41 vs 2.48; p < 0.001). Regardless of treatment arm, ACR20 clinical responders demonstrated, on average, numerically less radiographic progression than nonresponders (Table 3).

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Table 3.

Summary of mean (SD) change from baseline at Week 24 in PsA-modified SvdH (observed data) by treatment group and observed ACR response at Week 24.

Prevention of new joint erosion and JSN

In patients with ≥ 1 joint with an erosion score of 0 at baseline, a greater proportion of patients treated with IV GOL 2 mg/kg than with IV placebo showed no new erosion in those joints at Week 24 (74.3% vs 54.0%, respectively; difference of 20.3%; p < 0.001; Figure 2). Similarly, in patients with ≥ 1 joint with a JSN score = 0 at baseline, a greater proportion of GOL- treated than placebo-treated patients showed no new JSN in those joints at Week 24 (89.5% vs 75.7%, respectively; difference of 13.8%; p < 0.001; Figure 2).

Figure 2.
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Figure 2.

Changes in PsA-modified SvdH at Week 24: proportions of patients receiving IV treatment with no new erosions or JSN in joints with score = 0 at baseline (full analysis set for structural damage endpoints). IV: intravenous; JSN: joint space narrowing; PsA: psoriatic arthritis; SvdH: Sharp/van der Heijde score.

Patients with radiographic progression

At Week 24, a smaller proportion of GOL- versus placebo-treated patients demonstrated radiographic progression based on an increase from baseline > 0 in the PsA-modified SvdH (28.3% vs 57.0%, respectively; difference of −28.7%; p < 0.001). Similar results were observed when patients were assessed for an increase in the PsA-modified SvdH > 0.5 (18.6% vs 41.8%, respectively; difference of −23.2%; p < 0.001). Additionally, a smaller proportion of GOL- than placebo-treated patients demonstrated a change in the total PsA-modified SvdH exceeding the SDC at Week 24 (8.0% vs 27.0%, respectively; difference of −19.0%; p < 0.001; Figure 3). Similar findings were observed when evaluating the component erosion and JSN scores (Figure 3).

Figure 3.
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Figure 3.

Changes in PsA-modified SvdH at Week 24: proportions of patients receiving IV treatment with change exceeding the SDC for total, erosion, and JSN scores (full analysis set for structural damage endpoints). IV: intravenous; JSN: joint space narrowing; PsA: psoriatic arthritis; SDC: smallest detectable change; SvdH: Sharp/van der Heijde score.

DISCUSSION

PsA is a chronic inflammatory arthropathy than can be characterized by a range of symptoms, including arthritis, enthesitis, dactylitis, spondylitis, and skin and nail disease3,4. In about half of people with this disease, radiographic changes, including JSN, soft tissue changes, and new bone formation such as juxtaarticular periosteal reaction and ankylosis can lead to disability15,16. Biologic agents that inhibit TNF-α can significantly lessen PsA disease activity5.

In PsA, as in other conditions, patient preference plays a key role in choice of therapy. Factors such as route of administration (e.g., SC, IV, oral), dosing schedule, and other considerations can inform patients’ preferences17. As reported previously, both SC and IV GOL rapidly and significantly improve clinical signs and symptoms of PsA and other health outcomes in patients with established and active PsA7,9. Consistent with the inhibition of structural damage observed with SC GOL8, radiographic data reported herein demonstrated significantly better inhibition of structural damage progression in IV GOL- compared with placebo-treated patients. GOL inhibited structural damage progression independent of its effects on clinical disease activity, as assessed by ACR20, ACR50, and ACR70 responses, in posthoc analyses. Of note, consistent results have previously been observed for patients with RA treated by means of TNF inhibition, with benefits in radiographic progression observed among patients not achieving clinical improvement18. In PsA, it will be important to further evaluate the association between radiographic progression and disease activity with extended exposure to IV GOL as well as other biologic agents, including those with different mechanisms of action. Of course, it would not necessarily be indicated or prudent to continue any therapy in the absence of significant clinical benefit, even if there were to be inhibition of radiographic progression, because the longer-term implications of this are unknown.

Significant inhibition of structural damage progression in both components of the total PsA-modified SvdH (i.e., erosion and JSN scores) also was demonstrated with IV GOL relative to placebo. Findings obtained from 5 planned sensitivity analyses and baseline demographic and disease subgroup analyses were consistent and supported the efficacy of IV GOL in inhibiting radiographic progression. Results also were consistent for hands and feet when assessed individually and between patients with and without baseline use of MTX, NSAID, and oral low-dose corticosteroids. Importantly, a smaller proportion of GOL- than placebo-treated patients demonstrated radiographic progression based on the SDC for the total PsA-modified SvdH, as well as for the individual erosion and JSN measurements. Uniform results were observed when evaluating changes from baseline of > 0 or > 0.5, further supporting the finding that fewer GOL-treated patients exhibited radiographic progression. Good agreement between the 2 central independent radiograph readers was observed for Week 24 change scores, with ICC coefficients of 0.64–0.73 across the component and total change scores.

According to consensus findings from an international task force, the primary goal of treating individuals with PsA is to “maximize long-term health-related quality of life and social participation through control of signs and symptoms, prevention of structural damage, normalization or preservation of function, avoidance of toxicities, and minimization of comorbidities”19. Thus, it is noteworthy that IV GOL can effectively treat these diverse aspects of PsA, including inhibition of radiographic progression, which is particularly consequential for longer-term outcomes of patient function and disability20,21. Further analyses will extend radiographic evaluation of IV GOL in patients with PsA through 1 year to address a limitation of the current report (i.e., relatively short duration of followup in this chronic disease). The safety of IV GOL 2 mg/kg in these biologic-naive patients with active PsA was reported previously9.

IV GOL 2 mg/kg is significantly better than placebo in inhibiting progression of structural damage in patients with active PsA.

ONLINE SUPPLEMENT

Supplementary material accompanies the online version of this article.

Acknowledgment

The authors thank Stephen Xu, MS, of Janssen Research & Development LLC, for statistical support and Michelle L. Perate, MS, a professional medical writer funded by Janssen Scientific Affairs LLC, for writing and submission support.

Footnotes

  • Janssen Research & Development LLC funded this study. Janssen Biotech Inc., part of the Janssen Pharmaceutical Companies of Johnson & Johnson, manufactures golimumab. Authors who are employees of the study sponsor were involved in the study design, collecting and analyzing the data, and interpreting the results. Writing support was provided by Janssen Scientific Affairs LLC. Janssen Research & Development LLC approved the content of the article; the authors made the decision to submit for publication.

  • Full Release Article. For details see Reprints and Permissions at jrheum.org

  • Accepted for publication October 18, 2018.

Free online via JRheum Full Release option

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The Journal of Rheumatology
Vol. 46, Issue 6
1 Jun 2019
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Radiographic Progression Inhibition with Intravenous Golimumab in Psoriatic Arthritis: Week 24 Results of a Phase III, Randomized, Double-blind, Placebo-controlled Trial
Arthur Kavanaugh, M. Elaine Husni, Diane D. Harrison, Lilianne Kim, Kim Hung Lo, Lenore Noonan, Elizabeth C. Hsia
The Journal of Rheumatology Jun 2019, 46 (6) 595-602; DOI: 10.3899/jrheum.180681

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Radiographic Progression Inhibition with Intravenous Golimumab in Psoriatic Arthritis: Week 24 Results of a Phase III, Randomized, Double-blind, Placebo-controlled Trial
Arthur Kavanaugh, M. Elaine Husni, Diane D. Harrison, Lilianne Kim, Kim Hung Lo, Lenore Noonan, Elizabeth C. Hsia
The Journal of Rheumatology Jun 2019, 46 (6) 595-602; DOI: 10.3899/jrheum.180681
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Keywords

PSORIATIC ARTHRITIS
BIOLOGICAL THERAPY
RADIOGRAPHY
TUMOR NECROSIS FACTOR INHIBITORS
DISEASE ACTIVITY

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  • Canadian Adalimumab Postmarketing Observational Epidemiological Study Assessing Effectiveness in Psoriatic Arthritis (COMPLETE-PsA): 12-month Results of Comparative Effectiveness of Adalimumab and nbDMARDs
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  • radiography
  • tumor necrosis factor inhibitors
  • disease activity

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