Healthcare Costs of Not Achieving Remission in Patients with Rheumatoid Arthritis in the United States: A Retrospective Cohort Study

Real-World Treatment and Care Patterns in Patients With Rheumatoid Arthritis Initiating First-Line Tumor Necrosis Factor Inhibitor Therapy in the United States

OBJECTIVE

Treatment guidelines for rheumatoid arthritis (RA) recommend targeting low disease activity or remission and switching therapies for patients not reaching those targets. We evaluated real-world use of disease activity measures, treatment discontinuation, and switching patterns among patients with RA initiating a first-line tumor necrosis factor inhibitor (TNFi).

METHODS

Data from adult patients with RA initiating a first-line TNFi were collected from the American Rheumatology Network (January 2014-August 2021). The proportion of patients with recorded disease activity scores (Clinical Disease Activity Index [CDAI] or Routine Assessment of Patient Index Data 3 [RAPID3]) at TNFi initiation was assessed. Among patients with moderate or severe RA at TNFi initiation, reasons for discontinuation and subsequent advanced therapy were evaluated.

RESULTS

Among TNFi initiators (n = 15,182), 44.8% recorded a CDAI/RAPID3 score at treatment initiation; of those who did not, 47.0% had recorded a tender and/or swollen joint count or pain score. Among patients with moderate or severe RA (n = 1,651), 52% discontinued their initial TNFi during follow-up, of which 15%, 46%, 28%, and 12% initiated the same TNFi, another TNFi, a non-TNFi biologic, or a Janus kinase inhibitor, respectively. The proportion of patients restarting the same TNFi or initiating another TNFi varied according to TNFi discontinuation reason.

CONCLUSION

In clinical practice, over half of patients with RA initiating a first-line TNFi did not have baseline disease activity assessments. Many patients cycled through TNFi despite citing lack of efficacy as the most common reason for discontinuation. Consistent, objective monitoring of treatment response and timely switch to effective therapy is needed in patients with RA.

One-Year Medication Adherence and Persistence in Rheumatoid Arthritis in Clinical Practice: A Retrospective Analysis of Upadacitinib, Adalimumab, Baricitinib, and Tofacitinib

INTRODUCTION

This study evaluated 12 months adherence and persistence among Janus kinase inhibitors (upadacitinib, baricitinib, tofacitinib) and adalimumab, a tumor necrosis factor inhibitor (TNFi), in patients with rheumatoid arthritis (RA).

METHODS

This retrospective analysis used administrative claims data from the Merative™ MarketScan® Research Databases (2018-2022). Eligible adults had ≥ 1 RA diagnosis before the index date, ≥ 1 pharmacy claim for index medication, and ≥ 12 months of continuous insurance enrollment pre- and post-index. Adherence to treatment [defined as proportion of days covered (PDC) ≥ 80%], risk of treatment discontinuation, and mean time to discontinuation were assessed during the 12 months follow-up. Adjusted odds ratios (aOR), adjusted hazard ratios (aHR), and 95% confidence intervals (CI) were reported.

RESULTS

In total, 6317 patients were included (683 upadacitinib, 3732 adalimumab, 132 baricitinib, 1770 tofacitinib). Compared with upadacitinib, patients initiating adalimumab [aOR (95% CI): 0.82 (0.69, 0.96)], baricitinib [0.46 (0.31, 0.68)], and tofacitinib [0.74 (0.62, 0.88)] were significantly less likely to achieve PDC ≥ 80%. Risk of treatment discontinuation was significantly higher in patients treated with adalimumab [aHR (95% CI): 1.14 (1.01, 1.29)], baricitinib [1.48 (1.16, 1.90)], and tofacitinib [1.22 (1.07, 1.38)] compared with upadacitinib. Mean time to discontinuation was 256 (upadacitinib), 249 (adalimumab), 221 (baricitinib), and 239 (tofacitinib) days. Similar results were observed in patients with prior TNFi use.

CONCLUSIONS

Patients with RA, regardless of recent TNFi experience, initiating upadacitinib were significantly more likely to be adherent and less likely to discontinue therapy compared to adalimumab, baricitinib, and tofacitinib in the first 12 months of treatment.

Clinical and Economic Benefit of Achieving Disease Control in Psoriatic Arthritis and Ankylosing Spondylitis: A Retrospective Analysis from the OM1 Registry

BACKGROUND

There is limited evidence on the clinical and economic benefit of achieving disease control in psoriatic arthritis (PsA) and ankylosing spondylitis (AS), thus we aimed to assess the impact of disease control on healthcare resource use (HCRU) and direct medical costs among US patients with PsA or AS over 1 year.

METHODS

Data were derived from the US OM1 PsA/AS registries (PsA: 1/2013-12/2020; AS: 01/2013-4/2021) and the Optum Insight Clinformatics® Data Mart to identify adult patients with PsA or AS. Two cohorts were created: with disease control and without disease control. Disease control was defined as modified Disease Activity Index for Psoriatic Arthritis (DAPSA28) ≤ 4 for PsA and Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) < 4 for AS. Outcomes were all-cause inpatient, outpatient, and emergency department (ED) visits and associated costs over a 1-year follow-up period. Mean costs per person per year (PPPY) were assessed descriptively and adjusted odds ratios (aOR) with 95% confidence intervals (CI) were estimated for the likelihood of HCRU by logistic regression.

RESULTS

The study included 1235 PsA (with disease control: N = 217; without: N = 1018) and 581 AS patients (with disease control: N = 342; without: N = 239). Patients without disease control were more likely to have an inpatient (aOR [95% CI]; PsA: 3.0 [0.9, 10.1]; AS: 7.7 [2.3, 25.1]) or ED (PsA: 1.6 [0.6, 4.2]; AS: 3.5 [1.5, 8.3]) visit than those with disease control. Those without disease control, vs. those with disease control, had greater PPPY costs associated with inpatient (PsA: $1550 vs. $443), outpatient (PsA: $1789 vs. $1327; AS: $2498 vs. $2023), and ED (PsA: $114 vs. $57; AS: $316 vs. $50) visits.

CONCLUSIONS

Findings from this study demonstrate lower disease activity among patients with PsA and AS is associated with less HCRU and lower costs over the following year.

The Economic Benefit of Remission for Patients with Rheumatoid Arthritis

Introduction

In patients with rheumatoid arthritis (RA), attaining remission or low disease activity (LDA), as recommended by the treat-to-target approach, has shown to yield improvement in symptoms and quality of life. However, limited evidence from real-world settings is available to support the premise that better disease control is associated with lower healthcare costs. This study fills in evidence gaps regarding the cost of care by RA disease activity (DA) states and by therapy.

Methods

This retrospective cohort study linked medical and prescription claims from Optum Clinformatics Data Mart to electronic health record data from Illumination Health over 1/1/2010–3/31/2020. Mean annual costs for payers and patients were examined, stratifying on DA state and baseline use of conventional synthetic disease-modifying antirheumatic drugs (csDMARDs), biologics, and targeted synthetic (ts)DMARDs. Subgroup analysis examining within-person change in costs pre- and post-initiation of new therapy was also performed. Descriptive statistics, means, and boot-strapped confidence intervals were analyzed by DA state and by RA therapy. Furthermore, multivariate negative binomial regression analysis adjusting for key baseline characteristics was conducted.

Results

Of 2339 eligible patients, 19% were in remission, 40% in LDA, 29% in moderate DA (MDA), and 12% in high DA (HDA) at baseline. Mean annual costs during follow-up were substantially less for patients in remission ($40,072) versus those in MDA ($56,536) and HDA ($59,217). For patients in remission, csDMARD use was associated with the lowest mean annual cost ($25,575), tsDMARD was highest ($75,512), and tumor necrosis factor inhibitor (TNFi) ($69,846) and non-TNFi ($57,507) were intermediate. Among new TNFi (n = 137) and non-TNFi initiators (n = 107), 31% and 26% attained LDA/remission, respectively, and the time to achieve remission/LDA was numerically shorter in TNFi vs. non-TNFi initiators. For those on biologics, mean annual within-person medical and inpatient costs were lower after achieving LDA/remission, although pharmacy costs were higher.

Conclusions

Cost of care increased with increasing DA state, with patients in remission having the lowest costs. Optimizing DA has the potential for substantial savings in healthcare costs, although may be partially offset by the high cost of targeted RA therapies.

Supplementary Information

The online version contains supplementary material available at 10.1007/s40744-022-00473-6.

Predictors of Treatment Change Among Patients with Rheumatoid Arthritis Treated with TNF Inhibitors as First-Line Biologic Agent in the USA: A Cohort Study from Longitudinal Electronic Health Records

BACKGROUND

Previous observational studies utilizing administrative claims data have largely been unable to consider clinical factors that may be related to patterns of drug use among patients with rheumatoid arthritis (RA).

OBJECTIVE

To understand predictors of treatment changes following initiation of a tumor necrosis factor inhibitor (TNFi) using nation-wide electronic health record (EHR) data in the USA.

METHODS

The Optum Immunology Condition EHR data (01/01/2011-09/30/2019) was used to identify a population of adult patients with RA initiating a TNFi as the first line biologic disease-modifying anti-rheumatic drug (DMARD). The primary outcome was any treatment change during the 1-year post-index period defined as cycling to a different TNFi or switching to non-TNFi biologic or targeted synthetic DMARDs. Secondary outcomes were the individual components of TNFi cycling and switching, examined separately. To identify predictors of DMARD treatment changes, we used a least absolute shrinkage and selection operator (LASSO) regression model. Model c-statistics and odds ratios (ORs, 95% confidence intervals (CIs)) of predictors were reported.

RESULTS

We identified 24,871 patients with RA who initiated a TNFi. The mean age was 55.5 (± 13.7) years and 77.2% were female. Among the TNFi initiators, 22.2% experienced TNFi cycling or switching during the 1-year follow-up time. Predictors that are associated with higher likelihood of TNFi cycling or switching included female gender (OR: 1.26, 95% CI: 1.16-1.36) and glucocorticoid use (OR: 1.30, 95% CI: 1.21-1.40). In contrast, inflammatory bowel disease (OR: 0.62, 95% CI: 0.48-0.78), psoriasis (OR: 0.82, 95% CI: 0.70-0.95), recent use of methotrexate (OR: 0.89, 95% CI: 0.81-0.97), and vitamin D intake (OR: 0.92, 95% CI: 0.85-0.99) were negatively associated with TNFi cycling or switch.

CONCLUSIONS

Gender, glucocorticoid use, inflammatory bowel disease, psoriasis, and vitamin D intake were identified as significant predictors of TNFi cycling or switching for TNFi initiators in the RA population. Predicting treatment change remains challenging even with large detailed EHR data. This study aimed to identify key determinants of treatment changes among patients with rheumatoid arthritis (RA) initiating a tumor necrosis factor inhibitor (TNFi) as their first-line biologic disease-modifying antirheumatic drug (DMARD) in routine care settings using a US nation-wide longitudinal electronic health record (EHR). Among 24,871 patients with RA who initiated a TNFi, 22.2% experienced TNFi cycling or switching during the 1-year follow-up time. Female patients and those who used glucocorticoids were more likely to experience TNFi cycling or switching, whereas inflammatory bowel disease, psoriasis, recent methotrexate use, and vitamin D intake were negatively associated with the outcome. However, predicting treatment change remains challenging even with larger detailed EHR data potentially due to unmeasured factors such as prescriber's preference or patient's belief in the medication.