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Time-dependent biases in observational studies of comparative effectiveness research in rheumatology. A methodological review
  1. Michele Iudici1,
  2. Raphaël Porcher1,
  3. Carolina Riveros1,
  4. Philippe Ravaud1,2
  1. 1 Methods of Therapeutic Evaluation of Chronic Diseases (METHODS) Team, INSERM, UMR 1153, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center (CRESS), Paris, France
  2. 2 Cochrane France, Paris, France
  1. Correspondence to Dr Michele Iudici, Methods of Therapeutic Evaluation of Chronic Diseases (METHODS) team, INSERM, UMR 1153, Epidemiology and Biostatistics Sorbonne Paris Cité Research Center (CRESS), Paris 75001, France; michele_iudici{at}hotmail.com

Footnotes

  • Handling editor Josef S Smolen

  • Contributors MI, RP and PR contributed to the conception and design of the work. MI and CR contributed to the acquisition of data. MI, RP, CR and PR contributed to the analysis and interpretation of data. MI, RP, CR and PR helped draft the paper and critically revised it for important intellectual content. All the authors gave final approval of the version submitted.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

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

  • Data sharing statement All the data collected are available upon request.

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Footnotes

  • Handling editor Josef S Smolen

  • Contributors MI, RP and PR contributed to the conception and design of the work. MI and CR contributed to the acquisition of data. MI, RP, CR and PR contributed to the analysis and interpretation of data. MI, RP, CR and PR helped draft the paper and critically revised it for important intellectual content. All the authors gave final approval of the version submitted.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Not required.

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

  • Data sharing statement All the data collected are available upon request.

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