Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.

Daily urine protein (UP) loss is a cumbersome but important measurement to guide diagnosis and treatment of renal disease. Spot urine protein-creatinine ratio (UPCR) can been applied to estimate daily proteinuria. However, the correlations between spot and 24h proteinuria remain controversial. In th...

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Main Authors: Yih-Ting Chen, Heng-Jung Hsu, Cheng-Kai Hsu, Chin-Chan Lee, Kuang-Hung Hsu, Chiao-Yin Sun, Chun-Yu Chen, Yung-Chang Chen, Yi-Ching Yu, I-Wen Wu
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2019-01-01
Series:PLoS ONE
Online Access:https://doi.org/10.1371/journal.pone.0214614
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author Yih-Ting Chen
Heng-Jung Hsu
Cheng-Kai Hsu
Chin-Chan Lee
Kuang-Hung Hsu
Chiao-Yin Sun
Chun-Yu Chen
Yung-Chang Chen
Yi-Ching Yu
I-Wen Wu
author_facet Yih-Ting Chen
Heng-Jung Hsu
Cheng-Kai Hsu
Chin-Chan Lee
Kuang-Hung Hsu
Chiao-Yin Sun
Chun-Yu Chen
Yung-Chang Chen
Yi-Ching Yu
I-Wen Wu
author_sort Yih-Ting Chen
collection DOAJ
description Daily urine protein (UP) loss is a cumbersome but important measurement to guide diagnosis and treatment of renal disease. Spot urine protein-creatinine ratio (UPCR) can been applied to estimate daily proteinuria. However, the correlations between spot and 24h proteinuria remain controversial. In this cross-sectional study, simultaneous collection of 24h and spot urines were performed from 1,039 (derivation cohort) and 204 CKD patients (validation cohort) of Chang Gung Memorial Hospital, from 2007 to 2017. The correlations between spot UPCR and 24h proteinuria were compared. The mean age of patients of derivation and validation cohort was 63 and 55 years and the mean estimated glomerular filtration rate was 62 ± 35 and 59 ± 36 mL/min/m2, respectively. The correlation coefficient was 0.819 between UPCR and 24hUP. Prediction equation was derived as: Log1024hUP (g) = 0.814 x Log10UPCR (mg/mg) + 0.110 x Gender- 0.004 x Age + 0.004 x Body weight (kg) + 0.002 x CKD stage coefficient- 0.018, where CKD stage coefficient: CKD stage G1 = 1, G2 = 2, G3a = 3.1, G3b = 3.2, G4 = 4, G5 = 5. Correlation coefficient between measured and predicted 24hUP among derivation group and validation group is 0.866 and 0.915, respectively. However, the agreement of spot and daily estimates was less pronounced with proteinuria > 3g than lower values in Bland-Altman analysis. Spot UPCR can accurately predict 24hUP in patients with daily proteinuria below 3g. The development of this equation may facilitate estimation of 24hUP in the clinical practice.
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spelling doaj.art-f3dbd50e943949b88194d61a4c56a78b2022-12-21T20:40:07ZengPublic Library of Science (PLoS)PLoS ONE1932-62032019-01-01144e021461410.1371/journal.pone.0214614Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.Yih-Ting ChenHeng-Jung HsuCheng-Kai HsuChin-Chan LeeKuang-Hung HsuChiao-Yin SunChun-Yu ChenYung-Chang ChenYi-Ching YuI-Wen WuDaily urine protein (UP) loss is a cumbersome but important measurement to guide diagnosis and treatment of renal disease. Spot urine protein-creatinine ratio (UPCR) can been applied to estimate daily proteinuria. However, the correlations between spot and 24h proteinuria remain controversial. In this cross-sectional study, simultaneous collection of 24h and spot urines were performed from 1,039 (derivation cohort) and 204 CKD patients (validation cohort) of Chang Gung Memorial Hospital, from 2007 to 2017. The correlations between spot UPCR and 24h proteinuria were compared. The mean age of patients of derivation and validation cohort was 63 and 55 years and the mean estimated glomerular filtration rate was 62 ± 35 and 59 ± 36 mL/min/m2, respectively. The correlation coefficient was 0.819 between UPCR and 24hUP. Prediction equation was derived as: Log1024hUP (g) = 0.814 x Log10UPCR (mg/mg) + 0.110 x Gender- 0.004 x Age + 0.004 x Body weight (kg) + 0.002 x CKD stage coefficient- 0.018, where CKD stage coefficient: CKD stage G1 = 1, G2 = 2, G3a = 3.1, G3b = 3.2, G4 = 4, G5 = 5. Correlation coefficient between measured and predicted 24hUP among derivation group and validation group is 0.866 and 0.915, respectively. However, the agreement of spot and daily estimates was less pronounced with proteinuria > 3g than lower values in Bland-Altman analysis. Spot UPCR can accurately predict 24hUP in patients with daily proteinuria below 3g. The development of this equation may facilitate estimation of 24hUP in the clinical practice.https://doi.org/10.1371/journal.pone.0214614
spellingShingle Yih-Ting Chen
Heng-Jung Hsu
Cheng-Kai Hsu
Chin-Chan Lee
Kuang-Hung Hsu
Chiao-Yin Sun
Chun-Yu Chen
Yung-Chang Chen
Yi-Ching Yu
I-Wen Wu
Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
PLoS ONE
title Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
title_full Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
title_fullStr Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
title_full_unstemmed Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
title_short Correlation between spot and 24h proteinuria: Derivation and validation of equation to estimate daily proteinuria.
title_sort correlation between spot and 24h proteinuria derivation and validation of equation to estimate daily proteinuria
url https://doi.org/10.1371/journal.pone.0214614
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