The objective of this study was to compare rheumatoid arthritis (RA) disease activity and patient-reported outcomes (PROs) in a national sample of patients with RA with/without Sjögren’s syndrome (SS). Adults with RA from a large observational US registry (Corrona RA) with known SS status between 22 April 2010 and 31 July 2018 and a visit 12 (± 3) months after index date were identified (n = 36,256/52,757). SS status: determined from a yes/no variable reported at enrolment into the Corrona RA registry and follow-up visits. Index date: date that SS status was recorded (yes/no). Patients received biologic or targeted synthetic disease-modifying antirheumatic drugs as part of standard care. Patients with RA only were followed for ≥ 12 months to confirm the absence of SS. Patients were frequency- and propensity-score matched (PSM) 1:1 and stratified by disease duration and treatment response-associated variables, respectively. Clinical Disease Activity Index (CDAI) and PROs 12 months after index visit were compared in patients with and without SS. Baseline characteristics in 283 pairs of PSM patients were balanced. Mean change in CDAI score was numerically lower in patients with RA and SS than patients with RA only (8.8 vs 9.3). Reductions in PROs of pain, fatigue and stiffness were two- to threefold lower for patients with RA and SS versus RA only. Reductions in RA disease activity and RA-related PROs were lower in patients with RA and SS versus those with RA only. Our data indicate that SS adds to treatment challenges; physicians may wish to consider SS status when managing patients with RA.
Sjögren’s syndrome (SS) is a systemic autoimmune disease that can occur independently or in conjunction with another autoimmune condition, such as rheumatoid arthritis (RA) [1, 2]. SS has traditionally been thought of as either primary (SS only) or secondary; however, the terminology for secondary SS has recently evolved to be more descriptive, particularly because SS and other autoimmune diseases are co-existing conditions, rather than one being secondary to the other .
The current American College of Rheumatology (ACR) and European League Against Rheumatism (EULAR) treatment guidelines for RA and the ACR/EULAR classification criteria for SS do not include recommendations for treating patients with both RA and SS [3,4,5]. However, patients with both RA and SS have an increased disease burden [6, 7] and a decreased quality of life  compared with patients with only one autoimmune disease. For example, patients with RA and SS are more likely to have a longer duration of RA and worse joint damage compared with patients with RA only [6, 9]. Patients with SS alone are more likely to experience a negative impact on physical functioning (e.g., lifting and carrying, climbing stairs, bending and walking moderate distances) and social functioning (e.g., quality and quantity of social activities with others) than control subjects without dry eye disease or SS [8, 10].
The correlation of SS with increased disease burden in patients with RA includes an association with higher RA disease activity and anti-citrullinated protein antibody (ACPA) positivity (+) [6, 11]. ACPAs play a pivotal role in the progression of RA [11, 12], indicating a poor prognosis , more severe disease course and radiological destruction compared with patients with RA who are ACPA negative (−) . However, there are limited data on the impact of ACPA positivity and SS status in patients with RA and SS [6, 9, 14, 15].
Evaluating real-world data from patients with RA and SS and patients with RA only may enable clinicians to understand the different needs of these populations. The primary objective of this study was to compare RA disease activity and patient-reported outcomes (PROs) in patients from a national registry sample of patients with RA, with and without SS. A secondary objective was to compare RA disease activity and PROs in a sub-group of ACPA+ patients with RA, as measured by anti-cyclic citrullinated peptide (anti-CCP), with and without SS.
Materials and methods
The Consortium of Rheumatology Researchers of North America (Corrona) RA registry is an independent, prospective, national, observational cohort in which standardized and uniform treatment and outcome data are collected from treating rheumatologists at the time of a clinical encounter for treatment of patients with RA. Patients have been recruited from 182 private practices and academic sites across 42 US states, with 781 participating rheumatologists. As of June 2019, the Corrona RA registry included information on 52,757 patients. Data on 397,236 patient visits and approximately 188,161 patient-years of follow-up observation time have been collected, with a mean patient follow-up of 4.5 (median 3.3) years. The characteristics of the Corrona registry have been described previously .
This study was carried out in accordance with the Declaration of Helsinki. All participating investigators were required to obtain full institutional review board (IRB) approval for conducting non-interventional research involving human subjects. Sponsor approval and continuing review was obtained through a central IRB (New England Independent Review Board, NEIRB No. 120160610). For academic investigative sites that did not receive a waiver to use the central IRB, full board approval was obtained from the respective governing IRBs and documentation of approval was submitted to Corrona, LLC, prior to initiating any study procedures. All registry patients were required to provide written informed consent and authorization prior to participating.
This study included adult patients with rheumatologist-diagnosed RA enrolled in the Corrona RA registry between 22 April 2010 and 31 July 2018 (Fig. 1). SS status was captured by physicians at enrolment and follow-up visits using a provider form that included a yes/no question regarding the status of SS associated with RA. The presence of SS was determined clinically based upon the presence, or absence, of symptomatic dry eyes and/or mouth judged by the treating physician not to be related to medications. The index date was defined as the date the provider first reported SS status as yes (patients with RA and SS) or no (patients with RA only). Data were included if patients had at least one visit assessing SS status (SS associated with RA: yes/no) and at least 12 months of follow-up after index date. If data were available for more than one visit, the visit closest to the 12-month post-index date was used. Both patients with and without SS were required to have initiated a biologic (b) or targeted synthetic (ts) disease-modifying antirheumatic drug (DMARD). Patients without b/tsDMARD initiation or with missing SS information were excluded.
Patients were randomly frequency matched 1:1 (patients with RA and SS and patients with RA only) based on the duration of RA (< 2, ≥ 2 to < 5, ≥ 5 to < 10, ≥ 10 to < 15, ≥ 15 to < 20, ≥ 20 to < 30 and ≥ 30 years). Due to residual imbalance after frequency matching, frequency-matched patients were pooled together and propensity-score matched (PSM) 1:1 based on a logistic regression model-predicting group (RA and SS versus RA only). In the propensity score model, baseline demographics and response characteristics were compared between the cohorts (RA and SS versus RA only), and the absolute values of the standardized differences were estimated. The absolute value of the standardized difference of ≤ 0.1 for the overall population  was taken to indicate a negligible difference in the mean or prevalence of a covariate between cohorts; variables with a standardized difference > 0.1 were included in the construction of the propensity score model.
Variables assessed included demographic and socioeconomic characteristics, lifestyle factors, history of comorbidities, RA disease characteristics, previous and current RA therapy, RA disease activity and PROs. Patients with an SS diagnosis (patients with RA and SS) were compared with patients without an SS diagnosis (patients with RA only). For the subgroup analysis in patients who were anti-CCP+, anti-CCP testing was performed by investigators and anti-CCP+ was defined as ≥ 20 units/mL. Statistical significance was estimated using Student’s t test for continuous variables and Chi-square test for category variables.
The primary outcome was the mean change in Clinical Disease Activity Index (CDAI) score from index visit to Month 12 in PSM patients . The secondary outcome was mean change in PROs (modified Health Assessment Questionnaire [mHAQ], pain, fatigue, patient global assessment, EuroQol 5 dimensions [EQ-5D] index and morning stiffness) from index visit to Month 12 in PSM patients. Subgroup analyses were conducted in patients who were anti-CCP+ at index visit.
SS data were available for 36,256 patients with RA, of whom 1901 met the inclusion criteria (Fig. 1). There were 454 pairs of patients randomly generated with either RA and SS or RA only by frequency matching based on RA duration (Fig. 1 and Supplementary Table S1). Due to residual cohort imbalance after frequency matching (Supplementary appendix), the frequency-matched cohorts were pooled and further refined by PSM. Of the 454 pairs of frequency-matched patients, 283 pairs of patients were PSM (Table 1 and Fig. 1). The baseline demographics, disease characteristics and PROs of PSM patients with RA, with and without SS, were generally well balanced. At baseline, 62–64% of patients were being treated with tumor necrosis factor inhibitors, 21–22% with other b/tsDMARDs and 16–17% with abatacept. At baseline, 56–59% of patients in each cohort were receiving methotrexate monotherapy.
RA disease activity
At the 12-month follow-up, mean (standard deviation [SD]) CDAI score was numerically higher in patients with RA and SS compared with patients with RA only (Table 2). At the 12-month follow-up, the mean (SD) change in CDAI score from the index visit was numerically lower in patients with RA and SS compared to those with RA only (Fig. 2). These comparisons did not reach statistical significance.
At baseline, patients with RA and SS had lower mean (SD) PRO scores than patients with RA only (Table 1). However, at the 12-month follow-up visit, mean (SD) PRO scores were higher in patients with RA and SS compared with patients with RA only (Table 2), with the exception of mHAQ and EQ-5D index scores, which were similar in both cohorts. Mean (SD) patient pain, patient fatigue, and patient global assessment at the 12-month follow-up visit were significantly higher in patients with RA and SS compared with patients with RA only (p = 0.014, p = 0.018 and p = 0.023, respectively). Morning stiffness at 12 months was numerically higher in patients with RA and SS compared with patients with RA only, but this was not statistically significant. Mean changes from the index visit in pain, fatigue and patient global assessment were statistically significant (p = 0.002, p = 0.001 and p = 0.002, respectively), and two- to three-fold inferior (suggesting more impairment), for patients with RA and SS compared with patients with RA only (Fig. 2). The mean change in morning stiffness was numerically lower in patients with RA and SS compared with patients with RA only. The mean change in mHAQ was similar in both cohorts. There was no change in EQ-5D index score from index event until 12-month follow-up for patients with RA and SS, while the mean change for patients with RA only was marginally worse at 12 months.
Subgroup analyses in patients with anti-CCP+ RA
Of the 283 PSM pairs, there were 122 patients who were anti-CCP+: 56 (45.9%) patients with RA and SS and 66 (54.1%) patients with RA only (Fig. 1). In patients who were anti-CCP+, the mean (SD) change in CDAI score was similar between patients with RA and SS and those with RA only (Fig. 3). In patients who were anti-CCP+, the mean (SD) change in pain and fatigue was significantly lower in patients with RA and SS compared with patients with RA only (p = 0.048 and p = 0.003, respectively; Fig. 3). Although numerical differences were observed, there were no statistically significant differences in mean improvements in patient global assessment and morning stiffness outcomes between patients with anti-CCP+ RA and SS and those with anti-CCP+ RA only. In patients who were anti-CCP+, the mean change in mHAQ was the same in both cohorts; there was no change in EQ-5D index score from index event until 12 month follow-up for patients with RA only, while the mean change for patients with RA and SS was marginally worse at 12 months.
In this analysis of data from the large US Corrona RA registry, we compared RA disease activity and PROs among patients with RA, with and without SS, who initiated b/tsDMARD treatment. Initially, patients with RA and SS or RA only were frequency matched by duration of RA. Significantly fewer patients with RA and SS were in full-time employment and more were disabled or retired compared with patients with RA only. Patients with RA and SS were also more likely to have co-morbidities and to be taking several treatments for RA. These results complement published data examining the effect of SS on quality of life [8, 19]. The symptoms of SS exert a burden on a patient that may impact physical and social functioning, which in turn may affect employment status. Combined with the burden of RA , SS may substantially affect a patient’s quality of life.
There is a paucity of published data investigating disease activity in patients with RA and SS, particularly from studies measuring cumulative disease activity with index dates defined by SS onset [6, 9, 15, 21,22,23]; only two of the aforementioned studies included a follow-up period [6, 9]. The studies vary in size (82–1471 patients) [9, 22] and methods used for SS diagnosis, often utilizing a mixture of objective (e.g., Schirmer’s test) and subjective methods (e.g., physician exam and/or questionnaire from patient-reported symptoms) [21,22,23]. Two cross-sectional observational studies found no relationship between SS status and RA disease activity, as measured by Disease Activity Score 28 (DAS28) using erythrocyte sedimentation rate or C-reactive protein, in patients with RA with and without SS [22, 23]. It should be noted that the proportion of patients with RA and SS in these studies was small: n = 20/82  and n = 11/307 . In contrast, several studies have noted an association between SS and RA disease activity [9, 15, 21]. The analysis of 1471 patients with RA enrolled in a longitudinal RA registry revealed that patients with RA and SS (n = 415) experienced a longer duration of disease, higher RA disease activity (measured by RA disease activity index, CDAI and DAS28) at baseline and significantly lower reduction in RA disease activity at 12 months than patients with RA only . In a study of 636 patients with RA (n = 232 patients with SS symptoms), DAS28 was significantly higher for patients with moderate and severe symptoms compared with patients with no symptoms of SS . Similarly, among 509 patients with RA (n = 74 patients with RA and SS), patients with RA and SS had significantly higher DAS28 scores than patients with RA only .
To minimize selection bias in the current study, patients were PSM to account for variables associated with treatment response. The resulting cohorts (patients with RA and SS and patients with RA only) were generally well balanced in terms of baseline characteristics. At the 12-month follow-up visit, there were no significant differences in the change in clinical disease activity between patients with RA and SS and those with RA only; however, change in CDAI score after 12 months was numerically lower (suggesting greater impairment) in patients with RA and SS compared to those with RA only. The lack of association between SS status and RA disease activity in the present study is likely due to PSM; characteristics that are commonly seen with SS, and that are associated with RA disease activity, were accounted for in this analysis, but may not have been in the aforementioned studies, which did not use PSM [9, 15, 21].
Previous studies have demonstrated that patients with SS only (as opposed to patients with SS co-existing with another autoimmune condition) experience pain and fatigue , as do patients with RA only ; therefore, it could reasonably be inferred that, when co-existing with RA, SS exacerbates these PROs. In this analysis, at the 12-month follow-up visit, improvements in the majority of RA-related PROs were reduced in patients with RA and SS versus patients with RA only (suggesting more impairment). In accordance with this, several studies have demonstrated the additional burden of SS on patients with RA [9, 21, 23]. In an observational study, patients with RA with moderate or severe SS symptoms had significantly worse scores for mHAQ, pain and fatigue compared with patients with RA with no SS symptoms . In a longitudinal registry analysis, patients with RA and SS experienced significantly higher multidimensional (MD) HAQ fatigue scores at baseline compared with patients with RA only . After 12 months, patients with RA and SS experienced numerically lower reductions in MDHAQ fatigue scores than patients with RA only . In addition, an observational study demonstrated that patients with RA and SS experienced numerically greater pain (visual analog scale) scores compared with patients with RA only . Interestingly in our analysis, the differences in two PRO measures, mHAQ and EQ-5D index, between patients with RA and SS and patients with RA only, were marginal. However, the mHAQ and EQ-5D index questionnaires are completed by patients and would likely be impacted by underlying RA disease status.
Patients with RA who are ACPA+ are more likely to have a more severe disease course than patients who are ACPA− . A study of Greek patients with RA concluded that the presence of anti-CCP antibodies was associated with extra-articular manifestations, such as serositis and pulmonary fibrosis . In several studies, the proportion of patients with anti-CCP antibodies has been found to be higher in patients with RA and SS compared with patients with RA only (67.6–77.8% versus 59.4–71.9%) [6, 9, 15]. Therefore, we sought to clarify if the presence of SS would exacerbate the disease course further in anti-CCP+ patients. Contrary to previous research [6, 9, 15], in the current study, the proportion of patients with anti-CCP antibodies was lower in patients with RA and SS compared with patients with RA only (49.1% versus 55.5%); however, it should be noted that not all patients had measures reported. RA disease activity and PRO results were similar in the subgroup of patients with RA who were anti-CCP+, indicating that SS status did not affect outcomes differently in this patient population.
The biologic pathways associated with the differences in patients with RA with, and without, dry eyes and mouth (SS) are not clear [26,27,28]. However, the results of the current study do suggest that physicians may wish to consider SS status in the management of patients with RA; in particular, there may be a need for closer monitoring and assessment of response to treatment. More aggressive treatment of SS with RA may be needed.
This analysis has several strengths, namely the Corrona registry is the largest disease registry in the US that collects data directly from both providers and patients at the time of a routine clinical encounter. This allowed for patients with RA and SS or RA only to be selected from a broad population, ensuring satisfactory pairing . The Corrona registry does include a wide variety of rheumatology practices participating throughout the country (rural and urban areas, academic and private settings) and brings access to broad geographic locations and patients with diverse sociodemographic origins. Prior analyses compared Medicare patients with RA enrolled in Corrona to those who are not part of the registry and found similar demographic and co-morbidity characteristics, supporting the generalizability of the Corrona registry . Data are collected at regular intervals, which enabled us to evaluate outcomes at two different time points. Advanced epidemiological methods (e.g., PSM) were used to compare responses between patients with and without SS where selection bias may have existed. The presence of SS was captured on the provider form and is considered a critical field of data for Corrona. The results from this observational study in US patients complement previous studies [8, 9, 19, 21,22,23].
As opposed to previously reported studies, bias was minimized by PSM of the two cohorts (RA and SS versus RA only) by factors known to be associated with treatment response (e.g., age, sex, CDAI score, number of prior biologics, work status, history of co-morbidities and RA disease characteristics). Another limiting factor was that patients included in the registry were diagnosed by different rheumatologists across the US; diagnosis of SS was at the discretion of the treating physician (SS associated with RA: yes/no) and rheumatologists may have used a variety of mostly historical clinical signs and symptoms rather than objective testing (i.e., Schirmer’s test). Nevertheless, we believe that the manner in which these data were collected reflects real-world clinical practice with the reporting of dry eyes and/or mouth not associated with medications or mouth breathing during the night. Additionally, patients in the RA-only cohort also required a questionnaire entry for SS associated with RA (yes/no), potentially leading to under-ascertainment.
In this large US patient population initiating b/tsDMARD treatment, patients with RA only had greater improvements in RA disease activity and PROs than those with RA and SS; similar results were shown in anti-CCP+ patients. Physicians may wish to consider SS status when managing patients with RA; specifically, patients with RA and SS may require closer monitoring and more aggressive intervention to improve their disease experience than patients with RA only. Additional studies are needed to further understand the biological pathways involved in SS co-existing with RA, and subsequently to provide targeted treatment options for this population of patients.
Availability of data and material
The datasets generated and/or analyzed during the current study are not publicly available, but are available from the corresponding author upon reasonable request. The Corrona dataset is based on a large US multicenter study adhering to a number of institutional review boards, with complex logistics. Patients did not provide consent to raw data sharing during the data collection for this purpose, and the Corrona data-sharing policies do not permit raw data sharing for this purpose. An aggregated limited dataset from the current analyses is available to qualified investigators with an approved protocol. Data requests may be sent to Corrona, represented by Dr. Jeffrey D. Greenberg MD MPH, NYU School of Medicine, New York, NY, e-mail firstname.lastname@example.org.
Patel R, Shahane A (2014) The epidemiology of Sjogren's syndrome. Clin Epidemiol 6:247–255. https://doi.org/10.2147/CLEP.S47399
Mavragani CP, Moutsopoulos HM (2019) Primary versus secondary Sjogren syndrome: is it time to reconsider these terms? J Rheumatol 46:665–666. https://doi.org/10.3899/jrheum.180392
Singh JA, Saag KG, Bridges SL et al (2016) 2015 American College of Rheumatology guideline for the treatment of rheumatoid arthritis. Arthritis Care Res 68:1–26. https://doi.org/10.1002/art.39480
Smolen JS, Landewé R, Bijlsma J et al (2017) EULAR recommendations for the management of rheumatoid arthritis with synthetic and biological disease-modifying antirheumatic drugs: 2016 update. Ann Rheum Dis 76:960–977. https://doi.org/10.1136/annrheumdis-2016-210715
Shiboski CH, Shiboski SC, Seror R et al (2017) 2016 American College of Rheumatology/European League Against Rheumatism classification criteria for primary Sjogren's syndrome: a consensus and data-driven methodology involving three international patient cohorts. Ann Rheum Dis 76:9–16. https://doi.org/10.1136/annrheumdis-2016-210571
Brown LE, Frits ML, Iannaccone CK et al (2015) Clinical characteristics of RA patients with secondary SS and association with joint damage. Rheumatology (Oxford) 54:816–820. https://doi.org/10.1093/rheumatology/keu400
Alemao E, Saini, Y, Bao, Y et al (2018) Do anti-citrullinated protein antibodies and anti-Sjögren’s-syndrome-related antigen a double positive patients with secondary Sjögren’s syndrome and RA have higher joint disease activity? [abstract]. Arthritis Rheumatol 70(suppl 10):abstract 1463
Mertzanis P, Abetz L, Rajagopalan K et al (2005) The relative burden of dry eye in patients' lives: comparisons to a U.S. normative sample. Investig Ophthalmol Vis Sci 46:46–50. https://doi.org/10.1167/iovs.03-0915
Alemao E, Saini, Y, Bao Y et al (2018) The joint disease burden in patients with secondary Sjögren’s syndrome and RA compared to patients with RA only [abstract]. Arthritis Rheumatol 70(suppl 10):abstract 2506
Ware JE, Snow KK, Kosinski M et al (1993) SF-36 health survey: manual and interpretation guide. The Health Institute, New England Medical Center, Boston
Payet J, Belkhir R, Gottenberg JE et al (2015) ACPA-positive primary Sjogren's syndrome: true primary or rheumatoid arthritis-associated Sjogren's syndrome? RMD Open 1:e000066. https://doi.org/10.1136/rmdopen-2015-000066
Kurowska W, Kuca-Warnawin EH, Radzikowska A et al (2017) The role of anti-citrullinated protein antibodies (ACPA) in the pathogenesis of rheumatoid arthritis. Cent Eur J Immunol 42:390–398. https://doi.org/10.5114/ceji.2017.72807
van der Helm-van Mil AHM, Verpoort KN, Breedveld FC et al (2005) Antibodies to citrullinated proteins and differences in clinical progression of rheumatoid arthritis. Arthritis Res Ther 7:R949–958. https://doi.org/10.1186/ar1767
Alexiou I, Germenis A, Koutroumpas A et al (2008) Anti-cyclic citrullinated peptide-2 (CCP2) autoantibodies and extra-articular manifestations in Greek patients with rheumatoid arthritis. Clin Rheumatol 27:511–513. https://doi.org/10.1007/s10067-007-0800-1
He J, Ding Y, Feng M et al (2013) Characteristics of Sjogren's syndrome in rheumatoid arthritis. Rheumatology (Oxford) 52:1084–1089. https://doi.org/10.1093/rheumatology/kes374
Kremer JM (2016) The Corrona US registry of rheumatic and autoimmune diseases. Clin Exp Rheumatol 34:S96–S99
Austin PC (2011) An introduction to propensity score methods for reducing the effects of confounding in observational studies. Multivariate Behav Res 46:399–424. https://doi.org/10.1080/00273171.2011.568786
Aletaha D, Smolen J (2005) The Simplified Disease Activity Index (SDAI) and the Clinical Disease Activity Index (CDAI): a review of their usefulness and validity in rheumatoid arthritis. Clin Exp Rheumatol 23:S100–108
Omma A, Tecer D, Kucuksahin O et al (2018) Do the European League Against Rheumatism (EULAR) Sjogren's syndrome outcome measures correlate with impaired quality of life, fatigue, anxiety and depression in primary Sjogren's syndrome? Arch Med Sci 14:830–837. https://doi.org/10.5114/aoms.2017.70300
Ferro F, Elefante E, Luciano N et al (2017) One year in review 2017: novelties in the treatment of rheumatoid arthritis. Clin Exp Rheumatol 35:721–734
Uhlig T, Kvien TK, Jensen JL et al (1999) Sicca symptoms, saliva and tear production, and disease variables in 636 patients with rheumatoid arthritis. Ann Rheum Dis 58:415–422. https://doi.org/10.1136/ard.58.7.415
Antero DC, Parra AG, Miyazaki FH et al (2011) Secondary Sjogren's syndrome and disease activity of rheumatoid arthritis. Rev Assoc Med Bras 57:319–322
Haga HJ, Naderi Y, Moreno AM et al (2012) A study of the prevalence of sicca symptoms and secondary Sjogren's syndrome in patients with rheumatoid arthritis, and its association to disease activity and treatment profile. Int J Rheum Dis 15:284–288. https://doi.org/10.1111/j.1756-185X.2012.01717.x
Lackner A, Ficjan A, Stradner MH et al (2017) It's more than dryness and fatigue: the patient perspective on health-related quality of life in Primary Sjogren's Syndrome—a qualitative study. PLoS ONE 12:e0172056. https://doi.org/10.1371/journal.pone.0172056
McWilliams DF, Walsh DA (2017) Pain mechanisms in rheumatoid arthritis. Clin Exp Rheumatol 35(Suppl 107):94–101
Oliveira HF, de Souza TR, Carvalho CN et al (2015) Serologic profile and clinical markers of Sjogren syndrome in patients with rheumatoid arthritis. Oral Surg Oral Med Oral Pathol Oral Radiol 119:628–635. https://doi.org/10.1016/j.oooo.2015.02.479
Aluru SV, Shweta A, Bhaskar S et al (2017) Tear fluid protein changes in dry eye syndrome associated with rheumatoid arthritis: a proteomic approach. Ocul Surf 15:112–129. https://doi.org/10.1016/j.jtos.2016.09.005
Liao CC, Chou PL, Cheng CW et al (2016) Comparative analysis of novel autoantibody isotypes against citrullinated-inter-alpha-trypsin inhibitor heavy chain 3 (ITIH3)(542–556) peptide in serum from Taiwanese females with rheumatoid arthritis, primary Sjogren's syndrome and secondary Sjogren's syndrome in rheumatoid arthritis. J Proteomics 141:1–11. https://doi.org/10.1016/j.jprot.2016.03.031
Curtis JR, Chen L, Bharat A et al (2014) Linkage of a de-identified United States rheumatoid arthritis registry with administrative data to facilitate comparative effectiveness research. Arthritis Care Res (Hoboken) 66:1790–1798. https://doi.org/10.1002/acr.22377
The findings of this research were presented in poster format at the 2019 European League Against Rheumatism (EULAR) annual meeting: Harrold LR, Shan Y, Rebello S, et al. THU0110 Disease Activity and Patient-Reported Outcomes in Patients with RA with Sjögren’s Syndrome Enrolled in a Large Observational US Registry. Annals of the Rheumatic Diseases 2019;78(Supp 2):327–328 (https://doi.org/10.1136/annrheumdis-2019-eular.1957). The authors would like to thank all of the patients and providers who have participated in the Corrona RA registry. Corrona has been supported through contracted subscriptions in the last 2 years by AbbVie, Amgen, Boehringer Ingelheim, Bristol-Myers Squibb Company, Celgene, Crescendo, Eli Lilly and Company, Genentech, Gilead, GlaxoSmithKline, Janssen, Merck, Momenta Pharmaceuticals, Novartis, Ortho Dermatologics, Pfizer Inc., Regeneron, Roche, Sun, and UCB. The design and study conduct were a collaborative effort between Corrona and Bristol-Myers Squibb Company, and financial support for the study was provided by Bristol-Myers Squibb Company. Professional medical writing support and editorial assistance was provided by Rachel Rankin, PhD at Caudex, and was funded by Bristol-Myers Squibb Company.
This study was sponsored by Corrona, LLC and funded by Bristol-Myers Squibb Company. Professional medical writing support and editorial assistance was funded by Bristol-Myers Squibb Company.
Conflict of interest
Leslie R. Harrold is an employee of Corrona, LLC, a shareholder in Corrona, LLC and has received grant/research support from Pfizer and consulting fees from AbbVie, Bristol Myers Squibb, and Roche. Corrona, LLC has received funds from Bristol Myers Squibb for the analyses. Ying Shan has nothing to disclose. Sabrina Rebello is an employee of Corrona, LLC. Neil Kramer owns stock in AbbVie, Amgen, Johnson & Johnson, Pfizer and Regeneron. Evo Alemao is an employee of Bristol Myers Squibb. Sean E. Connolly and Sheila Kelly have stock options/bond holdings in, and are employees of, Bristol Myers Squibb. Joel Kremer has stock options/bond holdings in, and is an employee of, Corrona, LLC, has received consultancy fees from AbbVie, Amgen, Bristol Myers Squibb, Genentech, Lilly, Regeneron, Sanofi, and Pfizer; grant/research support from AbbVie, Bristol Myers Squibb, Genentech, Lilly, Novartis and Pfizer. Elliot D. Rosenstein reports serving on an advisory board and speakers bureau for Bristol Myers Squibb.
The database used in this study was the Corrona RA registry. This study was carried out in accordance with the Declaration of Helsinki. All participating investigators were required to obtain full institutional review board approval for conducting non-interventional research involving human subjects. Sponsor approval and continuing review was obtained through a central Institutional Review Board (IRB; New England Independent Review Board, NEIRB No. 120160610). For academic investigative sites that did not receive a waiver to use the central IRB, full board approval was obtained from the respective governing IRBs and documentation of approval was submitted to Corrona, LLC prior to initiating any study procedures. All registry patients were required to provide written informed consent and authorization prior to participating.
Consent to participate: All registry patients were required to provide written informed consent and authorization prior to participating. Consent for publication: Not applicable.
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Harrold, L.R., Shan, Y., Rebello, S. et al. Disease activity and patient-reported outcomes in patients with rheumatoid arthritis and Sjögren’s syndrome enrolled in a large observational US registry. Rheumatol Int 40, 1239–1248 (2020). https://doi.org/10.1007/s00296-020-04602-8
- Sjögren’s syndrome
- Rheumatoid arthritis
- Treatment response
- Disease activity
- Patient-reported outcomes