Dr. Griffiths et al reply

Jo Leadbetter; Hedley Griffiths

doi:10.3899/jrheum.220120

LetterLetter

Dr. Griffiths et al reply

Jo Leadbetter and Hedley Griffiths

The Journal of Rheumatology May 2022, jrheum.220120; DOI: https://doi.org/10.3899/jrheum.220120

Jo Leadbetter

WriteSource Medical, Lane Cove; OPAL Rheumatology Ltd, Sydney; Barwon Rheumatology Service, Geelong, Australia. The published study, "Persistence to Biologic Therapy Among Patients With Ankylosing Spondylitis: An Observational Study Using the OPAL Dataset" received financial assistance from Janssen-Cilag Pty Ltd, Australia. The study was conducted independently by OPAL with review and input on the study start up documents (protocol and statistical analysis plan) as well as review and input into final manuscript by Janssen staff member M. Acar. The authors declare no conflicts of interest relevant to this article. Address correspondence to Dr. H. Griffiths, Barwon Rheumatology Service, 156 Bellerine Street, Geelong, 3220 VIC, Australia. Email: hedley@brservice.com.au.

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Abstract

We thank Dr Schou for her insightful comments.¹ The interpretation of data from an observational study such as this is complex, and the conclusions are by necessity less robust than in a randomized controlled trial.

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The Journal of Rheumatology

Vol. 49, Issue 7

1 Jul 2022

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