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  • Dinsdale, GrahamUniversity of Manchester (author)

Quantitative outcome measures for systemic sclerosis-related Microangiopathy – Reliability of image acquisition in Nailfold Capillaroscopy

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • Elsevier BV,2017

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  • LIBRIS-ID:oai:lup.lub.lu.se:708ad83b-e785-4939-a1e8-0a490cc2e94d
  • https://lup.lub.lu.se/record/708ad83b-e785-4939-a1e8-0a490cc2e94dURI
  • https://doi.org/10.1016/j.mvr.2017.05.003DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Background Nailfold capillaroscopic parameters hold increasing promise as outcome measures for clinical trials in systemic sclerosis (SSc). Their inclusion as outcomes would often naturally require capillaroscopy images to be captured at several time points during any one study. Our objective was to assess repeatability of image acquisition (which has been little studied), as well as of measurement. Method 41 patients (26 with SSc, 15 with primary Raynaud's phenomenon) and 10 healthy controls returned for repeat high-magnification (300 ×) videocapillaroscopy mosaic imaging of 10 digits one week after initial imaging (as part of a larger study of reliability). Images were assessed in a random order by an expert blinded observer and 4 outcome measures extracted: (1) overall image grade and then (where possible) distal vessel locations were marked, allowing (2) vessel density (across the whole nailfold) to be calculated (3) apex width measurement and (4) giant vessel count. Intra-rater, intra-visit and intra-rater inter-visit (baseline vs. 1 week) reliability were examined in 475 and 392 images respectively. A linear, mixed-effects model was used to estimate variance components, from which intra-class correlation coefficients (ICCs) were determined. Results Intra-visit and inter-visit reliability estimates (ICCs) were (respectively): overall image grade, 0.97 and 0.90; vessel density, 0.92 and 0.65; mean vessel width, 0.91 and 0.79; presence of giant capillary, 0.68 and 0.56. These estimates were conditional on each parameter being measurable. Conclusion Within-operator image analysis and acquisition are reproducible. Quantitative nailfold capillaroscopy, at least with a single observer, provides reliable outcome measures for clinical studies including randomised controlled trials.

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  • Moore, Tonia LGreat Ormond Street Hospital (author)
  • O'Leary, NeilUniversity of Manchester (author)
  • Berks, MichaelUniversity of Manchester (author)
  • Roberts, ChristopherUniversity of Manchester (author)
  • Manning, Joanne BGreat Ormond Street Hospital (author)
  • Allen, JohnFreeman Hospital(Swepub:lu)pcel-jal (author)
  • Anderson, MarinaUniversity of Liverpool (author)
  • Cutolo, MaurizioUniversity of Genoa (author)
  • Hesselstrand, RogerLund University,Lunds universitet,Reumatologi och molekylär skelettbiologi,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Forskargruppen för systemisk skleros, Lund,Forskargrupper vid Lunds universitet,Rheumatology,Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund Systemic Sclerosis Research Group,Lund University Research Groups(Swepub:lu)reum-rhe (author)
  • Howell, KevinUniversity College London (author)
  • Pizzorni, CarmenUniversity of Genoa (author)
  • Smith, VanessaGhent University (author)
  • Sulli, AlbertoUniversity of Genoa (author)
  • Wildt, MarieLund University,Lunds universitet,Reumatologi och molekylär skelettbiologi,Sektion III,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Forskargruppen för systemisk skleros, Lund,Forskargrupper vid Lunds universitet,Rheumatology,Section III,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund Systemic Sclerosis Research Group,Lund University Research Groups(Swepub:lu)reum-mwi (author)
  • Taylor, ChristopherUniversity of Manchester (author)
  • Murray, AndreaUniversity of Manchester (author)
  • Herrick, Ariane LUniversity of Manchester (author)
  • University of ManchesterGreat Ormond Street Hospital (creator_code:org_t)

Related titles

  • In:Microvascular Research: Elsevier BV113, s. 56-590026-2862

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