Reliability of the OMERACT Giant cell arteritis Ultrasonography Score (OGUS): results of a patient-based exercise involving experts and non-experts in vascular ultrasonography

Duftner, C; Redlinger, N; Bruyn, GA; Chadachan, V; Chrysidis, S; Correyero, M; D'Agostino, MA; Dalsgaard Nielsen, B; Dasgupta, B; De Miguel, E; Diamantopoulos, AP; Fulvio, G; Gkikopoulos, N; Hartung, W; Hocevar, A; Keen, H; Kurteva, V; Mandl, P; Manger, E; Mercatelli, P; Midtgard, I; Monti, S; Muller, R; Mykkänen, K; Pineda, C; Ponte, C; Reffat, D; Sarbu, AC; Seitz, L; Terslev, L; Schmidt, WA; Dejaco, C

doi:10.1136/rmdopen-2024-004667

Vasculitis & polymyalgia rheumatica

Reliability of the OMERACT Giant cell arteritis Ultrasonography Score (OGUS): results of a patient-based exercise involving experts and non-experts in vascular ultrasonography

RMD OpenPublished 2 Jan 2025Reliability study

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Authors' conclusion

Inter-reader reliability was fair to moderate, and intra-reader reliability was good for OGUS, Southend score and Halo count among experts. Inter-reader reliability of non-experts in vascular ultrasonography improved after the training.

Study context

Population: Six Giant cell arteritis (GCA) patients in clinical remission (mean age 78±5.1 years; 2 [33.3%] women), US of temporal and axillary arteries bilaterally6 GCA patients
Participants: 12 vs 12

Comparison: Experts vs non-experts in vascular US
Expertsn = 12
Non-expertsn = 12
Outcome: Inter-reader and intra-reader reliability (ICC) of the OGUS, Southend score and Halo count

Methodological detailspatient-based exercise, experts and non-experts, two rounds separated ≥3 hours

Patient-based exercise
Experts and non-experts
Two rounds separated ≥3 hours

Main finding

As reported in the abstract

Reliability (ICC) of OGUS, Southend score and Halo count

Experts, inter-reader intraclass correlation coefficient (ICC), OGUS (both rounds): 0.60
Experts, inter-reader ICC, Southend score, round 1: 0.40
Experts, inter-reader ICC, Southend score, round 2: 0.51
Experts, inter-reader ICC, Halo count, round 1: 0.45
Experts, inter-reader ICC, Halo count, round 2: 0.52
Experts, median intra-reader ICC, OGUS: 0.86
Experts, median intra-reader ICC, Southend score: 0.73
Experts, median intra-reader ICC, Halo count: 0.65
Non-experts, inter-reader ICC, OGUS, round 1: 0.20
Non-experts, inter-reader ICC, normalised Southend score, round 1: 0.20
Non-experts, inter-reader ICC, normalised Halo count, round 1: 0.35
Non-experts, inter-reader ICC, OGUS, after training: 0.52
Non-experts, inter-reader ICC, normalised Southend score, after training: 0.29
Non-experts, inter-reader ICC, normalised Halo count, after training: 0.54

Reference

Authors: Duftner C, Redlinger N, Bruyn GA, Chadachan V, Chrysidis S, Correyero M, et al.
All 32 authors
Duftner C, Redlinger N, Bruyn GA, Chadachan V, Chrysidis S, Correyero M, D'Agostino MA, Dalsgaard Nielsen B, Dasgupta B, De Miguel E, Diamantopoulos AP, Fulvio G, Gkikopoulos N, Hartung W, Hocevar A, Keen H, Kurteva V, Mandl P, Manger E, Mercatelli P, Midtgard I, Monti S, Muller R, Mykkänen K, Pineda C, Ponte C, Reffat D, Sarbu AC, Seitz L, Terslev L, Schmidt WA, Dejaco C
Journal: RMD Open
Published: 2 Jan 2025
DOI: 10.1136/rmdopen-2024-004667
PubMed: 39753294

Topic: Vasculitis & polymyalgia rheumatica

Comparison

Experts vs non-experts in vascular US (non-experts trained between rounds)

Group definitions

Experts: experts in vascular ultrasonography
Non-experts: non-experts; 90 min theoretical and 240 min practical training between rounds 1 and 2

Key notes

Normalised Southend score = score divided by available segments

Original publication

Reliability of the OMERACT Giant cell arteritis Ultrasonography Score (OGUS): results of a patient-based exercise involving experts and non-experts in vascular ultrasonography. RMD Open. Published 2 January 2025. doi:10.1136/rmdopen-2024-004667

Read the original article ↗

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