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Original article
Patient burden of Sjögren’s: a comprehensive literature review revealing the range and heterogeneity of measures used in assessments of severity
  1. Katherine M Hammitt1,
  2. April N Naegeli2,
  3. Remon W M van den Broek3 and
  4. Julie A Birt2
  1. 1 Sjögren’s Syndrome Foundation, Bethesda, Maryland, USA
  2. 2 Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana, USA
  3. 3 Excerpta Medica, Amsterdam, The Netherlands
  1. Correspondence to Katherine M Hammitt, Sjögren’s Syndrome Foundation, Bethesda, Maryland, USA; khammitt{at}sjogrens.org

Abstract

Context The severity of Sjögren’s syndrome has been evaluated using a wide variety of clinical measures and patient-reported outcomes (PROs). This may contribute to the lack of clarity concerning the burden of Sjögren’s from the patient perspective.

Objective To perform a comprehensive peer-reviewed literature analysis of the patient aspects of Sjögren’s, focusing on PROs, to investigate the complexity underlying the evaluation of the syndrome and to elucidate the discordance between the different measures.

Methods We searched Embase for articles published between January 2005 and September 2015. Research articles, clinical and diagnostic reviews, and validation studies with a focus on patient aspects of Sjögren’s were selected as the primary information source.

Results 157 articles met the eligibility criteria. A wide variety of assessment measures used to evaluate glandular, extraglandular and functional domains were observed. Many different, non-validated Visual Analogue Scales, with a wide range of anchor words, were used in the quantification of Sjögren’s disease burden, impeding comparisons between studies. Relatively few clinical trials of drug therapies used validated scales: European League Against Rheumatism Sjögren’s Syndrome Patient Reported Index was used most often for symptom assessment and 36 Item Short Form Survey for quality of life (QoL).

Conclusion A wide range and diversity of measures are used to evaluate the patient burden of Sjögren’s; most are not validated for use in this disease. PRO endpoints, validated specifically in Sjögren’s, that demonstrate improvement are needed. These measures should focus on QoL aspects important to patients and will most likely involve gauging change in function rather than patient-reported symptoms.

  • Sjögren’s Syndrome
  • Patient Perspective
  • Outcomes Research
  • Quality of Life

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

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Footnotes

  • Contributors All authors were involved in drafting the article or revising it critically for important intellectual content, and all authors approved the final version to be published. KMH had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. Study conception and design: KMH, RWMB, ANN, JAB. Acquisition of data: RWMB, ANN, JAB. Analysis and interpretation of data: KMH, RWMB, ANN, JAB.

  • Funding This study was funded by Eli Lilly and Company.

  • Competing interests KMH is Vice President of Medical and Scientific Affairs of the Sjögren’s Syndrome Foundation. ANN and JAB are employees and stockholders of Eli Lilly and Company. RWMB is employed by Excerpta Medica B.V.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement No additional data are available.

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