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Development of a core outcome domain set for clinical research on capillary malformations (the COSCAM project).

  • Author(s): Langbroek, GB;
  • Wolkerstorfer, A;
  • Horbach, SER;
  • Spuls, PI;
  • Kelly, KM;
  • Robertson, SJ;
  • van Raath, MI;
  • Al-Niaimi, F;
  • Kono, T;
  • Boixeda, P;
  • Laubach, HJ;
  • Badawi, AM;
  • Troilius Rubin, A;
  • Haedersdal, M;
  • Manuskiatti, W;
  • van der Horst, CMAM;
  • Ubbink, DT;
  • COSCAM study group
  • et al.

Published Web Location

https://doi.org/10.1111/jdv.17376
Abstract

Background

Due to a large variety in treatment outcomes reported in therapeutic trials and lacking patient-relevant outcomes, it is hard to adequately compare and improve current therapies for patients with capillary malformations (CMs). The Core Outcome Set for Capillary Malformations (COSCAM) project aims to develop a core outcome set (COS) for use in future CM trials, in which we will first develop a core outcome (sub)domain set (CDS). Here, we describe the methods for the development of a CDS and present the results of the first development stage.

Methods

The COSCAM project is carried out according to the recommendations of the Cochrane Skin Core OUtcomes Set INitiative (CS-COUSIN) and the Core Outcome Measures in Effectiveness Trials (COMET) initiative. During the first stage, we identified all potentially relevant outcome subdomains based on a systematic review, two focus group sessions and input from patient representatives of Dutch patient organizations and the COSCAM-founding group. In stage two, we will present the subdomains in a three-round e-Delphi study and online consensus meeting, in which CM patients, parents/caregivers and CM experts worldwide rate the importance of the proposed subdomains, hereby finalizing the core outcome (sub)domains of the CDS.

Results

A total of 67 potential outcome subdomains were included; sixteen were previously used in the literature, 20 were proposed by Dutch patients and their parents/caregivers (n = 13) in focus group sessions and 38 were suggested by the experts of the COSCAM-founding group. Seven were excluded because of overlap.

Conclusion

The final CDS may serve as a minimum standard in future CM trials, thereby facilitating adequate comparison of treatment outcomes. After this CDS development, we will select appropriate outcome measurement instruments to measure the core outcome subdomains.

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