Evidence map›Paper›PMID 30939176›Full record

ArticlePloS one2019

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

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

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In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 1 synthesis or guideline pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Yih-Ting ChenDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Heng-Jung HsuDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Cheng-Kai HsuDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Chin-Chan LeeDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Kuang-Hung HsuHealthy Aging Research Center, Laboratory for Epidemiology, Department of Health Care Management, Chang Gung University, Taoyuan, Taiwan.
Chiao-Yin SunDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Chun-Yu ChenDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Yung-Chang ChenDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.
Yi-Ching YuDepartment of Neurology, Chang Gung Memorial Hospital, Keelung, Taiwan.
I-Wen WuDepartment of Nephrology, Chang Gung Memorial Hospital, Keelung, Taiwan.ORCID 0000-0001-8535-3582

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

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.

Indexed as

AgedAge FactorsArea Under CurveCreatinineCross-Sectional StudiesFemaleGlomerular Filtration RateHumansLinear ModelsMaleMiddle AgedProteinuriaRenal Insufficiency, ChronicROC CurveSeverity of Illness IndexSex FactorsCreatinine

Identifiers

PMID30939176
PMCPMC6445407

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.