Dergiler / International Journal of Medical Biochemistry / 2021 / Cilt: 4 - Sayı: 3

Reference change value and measurement uncertainty of CRP, ferritin, procalcitonin, troponin I, and BNP tests in COVID-19 monitoring: How much change is significant?

Sayfa
150–156
DOI
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Conclusion: Providing the RCV and MU values with the test results in laboratory reports of these important biomark ers, which are frequently seen in high concentrations in COVID-19 patients, would offer valuable information for more accurate clinical interpretation.

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Amaç & Hipotez:Objectives: This study was designed to determine the point of clinically significant change in consecutive measure ments of high concentrations of C-reactive protein (CRP), ferritin, procalcitonin, troponin I, and brain natriuretic peptide (BNP) in patients diagnosed with COVID-19.
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Temel Bulgular & Veri:Methods: The reference change value (RCV) for each analyte was estimated using the following formula: RCV=${2^{1/2}}_XZ_X\left(C{V^2}_a+C{V^2}_i\right)^{1/2}$.
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Sonuç & Katkı:Conclusion: Providing the RCV and MU values with the test results in laboratory reports of these important biomark ers, which are frequently seen in high concentrations in COVID-19 patients, would offer valuable information for more accurate clinical interpretation.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alan Parametreleri

Özet

Objectives: This study was designed to determine the point of clinically significant change in consecutive measure ments of high concentrations of C-reactive protein (CRP), ferritin, procalcitonin, troponin I, and brain natriuretic peptide (BNP) in patients diagnosed with COVID-19. Methods: The reference change value (RCV) for each analyte was estimated using the following formula: RCV=${2^{1/2}}_XZ_X\left(C{V^2}_a+C{V^2}_i\right)^{1/2}$. The combined RCV was calculated using the mean CV value determined using different concentra tions. Measurement uncertainty (MU) was estimated according to NordTest guideline. The root-mean-square (RMS) bias and nominal uncertainty values (uCref) were calculated. Standard uncertainty (ubias) and combined standard uncertainty (u) were calculated using the formula RMSbias²+uCref² and √(uRW²+ubias²)/2, respectively. Expanded un certainty (U) was obtained by multiplying u by a coverage factor. Results: The lowest RCV values of CRP, ferritin, procalcitonin, BNP, and troponin I tests were 94.57%, 37.16%, 40.55%, 42.01%, and 28.99%, respectively. The combined RCV value was 94.6%, 38.31%, 41.57%, 42.35%, and 29.36% for CRP, ferritin, procalcitonin, troponin I, and BNP, respectively. The U of the CRP test was between 4.70%, and 5.49%. The low est MU values of ferritin, troponin I, and BNP tests were 48.45%, 48.24%, and 53%, respectively. Conclusion: Providing the RCV and MU values with the test results in laboratory reports of these important biomark ers, which are frequently seen in high concentrations in COVID-19 patients, would offer valuable information for more accurate clinical interpretation.

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Bu Makaleye Atıf Yap

ZORBOZAN, N., ZORBOZAN, O. (2021). Reference change value and measurement uncertainty of CRP, ferritin, procalcitonin, troponin I, and BNP tests in COVID-19 monitoring: How much change is significant?. International Journal of Medical Biochemistry, Cilt: 4 - Sayı: 3, 150–156. https://ajindex.com/articles/415042

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Kaynakça (14)

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