Journal
JOURNAL OF CLINICAL EPIDEMIOLOGY
Volume 126, Issue -, Pages 207-216Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jclinepi.2020.01.028
Keywords
Receiver operating characteristic curve; Risk prediction models; Classification plots; Risk threshold
Funding
- Research FoundationeFlanders (FWO) [G0B4716 N]
- Internal Funds KU Leuven [C24/15/037]
- Patient-Centered Outcomes Research Institute (PCORI) Award [ME-1606-35,555]
- European Union's FP7 Programme [602150]
- NIHR Biomedical Research Center, Oxford
- Cancer Research UK [C49297/A27294]
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Objectives: Receiver operating characteristic (ROC) curves show how well a risk prediction model discriminates between patients with and without a condition. We aim to investigate how ROC curves are presented in the literature and discuss and illustrate their potential limitations. Study Design and Setting: We conducted a pragmatic literature review of contemporary publications that externally validated clinical prediction models. We illustrated limitations of ROC curves using a testicular cancer case study and simulated data. Results: Of 86 identified prediction modeling studies, 52 (60%) presented ROC curves without thresholds and one (1%) presented an ROC curve with only a few thresholds. We illustrate that ROC curves in their standard form withhold threshold information have an unstable shape even for the same area under the curve (AUC) and are problematic for comparing model performance conditional on threshold. We compare ROC curves with classification plots, which show sensitivity and specificity conditional on risk thresholds. Conclusion: ROC curves do not offer more information than the AUC to indicate discriminative ability. To assess the model's performance for decision-making, results should be provided conditional on risk thresholds. Therefore, if discriminatory ability must be visualized, classification plots are attractive. (C) 2020 Published by Elsevier Inc.
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