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- W4361274138 abstract "Abstract Objectives Few studies have reported on delta checks for tumour markers, even though these markers are often evaluated serially. Therefore, this study aimed to establish a practical delta check limit in different clinical settings for five tumour markers: alpha-fetoprotein, cancer antigen 19-9, cancer antigen 125, carcinoembryonic antigen, and prostate-specific antigen. Methods Pairs of patients’ results (current and previous) for five tumour markers between 2020 and 2021 were retrospectively collected from three university hospitals. The data were classified into three subgroups, namely: health check-up recipient (subgroup H), outpatient (subgroup O), and inpatient (subgroup I) clinics. The check limits of delta percent change (DPC), absolute DPC (absDPC), and reference change value (RCV) for each test were determined using the development set (the first 18 months, n=179,929) and then validated and simulated by applying the validation set (the last 6 months, n=66,332). Results The check limits of DPC and absDPC for most tests varied significantly among the subgroups. Likewise, the proportions of samples requiring further evaluation, calculated by excluding samples with both current and previous results within the reference intervals, were 0.2–2.9% (lower limit of DPC), 0.2–2.7% (upper limit of DPC), 0.3–5.6% (absDPC), and 0.8–35.3% (RCV 99.9% ). Furthermore, high negative predictive values >0.99 were observed in all subgroups in the in silico simulation. Conclusions Using real-world data, we found that DPC was the most appropriate delta-check method for tumour markers. Moreover, Delta-check limits for tumour markers should be applied based on clinical settings." @default.
- W4361274138 created "2023-03-31" @default.
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- W4361274138 date "2023-03-31" @default.
- W4361274138 modified "2023-10-12" @default.
- W4361274138 title "Practical delta check limits for tumour markers in different clinical settings" @default.
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- W4361274138 doi "https://doi.org/10.1515/cclm-2022-1098" @default.
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