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Shaikh KJ, Osio VA, Leeflang MM, Shaikh N. Procalcitonin, C-reactive protein, and erythrocyte sedimentation rate for the diagnosis of acute pyelonephritis in children. Cochrane Database Syst Rev 2020; 9:CD009185. [PMID: 32911567 PMCID: PMC8479592 DOI: 10.1002/14651858.cd009185.pub3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND In children with urinary tract infection (UTI), only those with pyelonephritis (and not cystitis) are at risk for developing long-term renal sequelae. If non-invasive biomarkers could accurately differentiate children with cystitis from children with pyelonephritis, treatment and follow-up could potentially be individualized. This is an update of a review first published in 2015. OBJECTIVES The objectives of this review were to 1) determine whether procalcitonin (PCT), C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) can replace the acute DMSA scan in the diagnostic evaluation of children with UTI; 2) assess the influence of patient and study characteristics on the diagnostic accuracy of these tests, and 3) compare the performance of the three tests to each other. SEARCH METHODS We searched MEDLINE, EMBASE, DARE, Web of Science, and BIOSIS Previews through to 17th December 2019 for this review. The reference lists of all included articles and relevant systematic reviews were searched to identify additional studies not found through the electronic search. SELECTION CRITERIA We only considered published studies that evaluated the results of an index test (PCT, CRP, ESR) against the results of an acute-phase 99Tc-dimercaptosuccinic acid (DMSA) scan (conducted within 30 days of the UTI) in children aged 0 to 18 years with a culture-confirmed episode of UTI. The following cut-off values were used for the primary analysis: 0.5 ng/mL for procalcitonin, 20 mg/L for CRP and 30 mm/hour for ESR. DATA COLLECTION AND ANALYSIS Two authors independently applied the selection criteria to all citations and independently abstracted data. We used the bivariate model to calculate pooled random-effects pooled sensitivity and specificity values. MAIN RESULTS A total of 36 studies met our inclusion criteria. Twenty-five studies provided data for the primary analysis: 12 studies (1000 children) included data on PCT, 16 studies (1895 children) included data on CRP, and eight studies (1910 children) included data on ESR (some studies had data on more than one test). The summary sensitivity estimates (95% CI) for the PCT, CRP, ESR tests at the aforementioned cut-offs were 0.81 (0.67 to 0.90), 0.93 (0.86 to 0.96), and 0.83 (0.71 to 0.91), respectively. The summary specificity values for PCT, CRP, and ESR tests at these cut-offs were 0.76 (0.66 to 0.84), 0.37 (0.24 to 0.53), and 0.57 (0.41 to 0.72), respectively. AUTHORS' CONCLUSIONS The ESR test does not appear to be sufficiently accurate to be helpful in differentiating children with cystitis from children with pyelonephritis. A low CRP value (< 20 mg/L) appears to be somewhat useful in ruling out pyelonephritis (decreasing the probability of pyelonephritis to < 20%), but unexplained heterogeneity in the data prevents us from making recommendations at this time. The procalcitonin test seems better suited for ruling in pyelonephritis, but the limited number of studies and the marked heterogeneity between studies prevents us from reaching definitive conclusions. Thus, at present, we do not find any compelling evidence to recommend the routine use of any of these tests in clinical practice.
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Affiliation(s)
- Kai J Shaikh
- Department of Pediatrics, Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Victor A Osio
- Department of General Pediatrics, Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
| | - Mariska Mg Leeflang
- Department of Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, Netherlands
| | - Nader Shaikh
- General Academic Pediatrics, Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
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Yang S, Chua ME, Bauer S, Wright A, Brandström P, Hoebeke P, Rittig S, De Gennaro M, Jackson E, Fonseca E, Nieuwhof-Leppink A, Austin P. Diagnosis and management of bladder bowel dysfunction in children with urinary tract infections: a position statement from the International Children's Continence Society. Pediatr Nephrol 2018; 33:2207-2219. [PMID: 28975420 DOI: 10.1007/s00467-017-3799-9] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND We present a consensus view from the International Children's Continence Society (ICCS) on the evaluation and management of bladder bowel dysfunction (BBD) in children with urinary tract infection (UTI). The statement aims to highlight the importance of BBD in the development and recurrence of childhood UTI and its management to reduce its associated morbidity and sequelae. METHODS A systematic literature search was done on PubMed, Embase, and Scopus databases until August 15, 2016. Relevant publications concerning BBD and its relationship with UTI among children were reviewed and aggregated for statements of recommendation. Discussion by the ICCS Board and a multi-disciplinary core group of authors resulted in a document available on its website for all ICCS members to review. Insights and feedback were considered with consensus and agreement reached to finalize this position statement. RESULTS BBD in children with UTI is summarized. Details regarding epidemiology, pathophysiology, and recommendations for general and family practitioners and pediatricians relating to the evaluation and management of this condition are presented. CONCLUSIONS This document serves as the position statement from ICCS, based on literature review and expert opinion providing our current understanding of BBD in children with UTI.
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Affiliation(s)
- Stephen Yang
- Department of Urology, Taipei Tzu-Chi Hospital, and Buddhist Tzu Chi University, Taipei, Taiwan.
| | - Michael E Chua
- Department of Urology, Taipei Tzu-Chi Hospital, and Buddhist Tzu Chi University, Taipei, Taiwan
- Department of Urology, The Hospital for Sick Children, Toronto, ON, Canada
- Institute of Urology, St. Luke's Medical Center, Quezon City, Philippines
| | - Stuart Bauer
- Department of Urology, Boston Children's Hospital, Boston, MA, USA
| | - Anne Wright
- Department of Paediatric Nephrourology, Evelina Children's Hospital, London, UK
| | - Per Brandström
- Department of Pediatrics, The Queen Silvia Children's Hospital, Gothenburg, Sweden
| | - Piet Hoebeke
- Department of Urology, Ghent University Hospital, Ghent, Belgium
| | - Søren Rittig
- Department of Pediatrics, Aarhus University, Aarhus, Denmark
| | - Mario De Gennaro
- Department of Urology, Bambino Gesù Children's Hospital of Rome, Rome, Italy
| | - Elizabeth Jackson
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Eliane Fonseca
- Department of Pediatrics, Rio de Janeiro State University, Rio de Janeiro, Brazil
| | | | - Paul Austin
- Department of Urology, St Louis Children's Hospital, St. Louis, MO, USA
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3
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Diagnostic value of serum procalcitonin for acute pyelonephritis in infants and children with urinary tract infections: an updated meta-analysis. World J Urol 2015; 34:431-41. [DOI: 10.1007/s00345-015-1630-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 06/05/2015] [Indexed: 10/23/2022] Open
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Shaikh N, Borrell JL, Evron J, Leeflang MMG. Procalcitonin, C-reactive protein, and erythrocyte sedimentation rate for the diagnosis of acute pyelonephritis in children. Cochrane Database Syst Rev 2015; 1:CD009185. [PMID: 25603480 PMCID: PMC7104675 DOI: 10.1002/14651858.cd009185.pub2] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND In children with urinary tract infection (UTI), only those with pyelonephritis (and not cystitis) are at risk for developing long-term renal sequelae. If non-invasive biomarkers could accurately differentiate children with cystitis from children with pyelonephritis, treatment and follow-up could potentially be individualized. OBJECTIVES The objectives of this review were to 1) determine whether procalcitonin, C-reactive protein (CRP), erythrocyte sedimentation rate (ESR) can replace the acute DMSA scan in the diagnostic evaluation of children with UTI; 2) assess the influence of patient and study characteristics on the diagnostic accuracy of these tests, and 3) compare the performance of the three tests to each other. SEARCH METHODS We searched MEDLINE, EMBASE, DARE, Web of Science, and BIOSIS Previews for this review. The reference lists of all included articles and relevant systematic reviews were searched to identify additional studies not found through the electronic search. SELECTION CRITERIA We only considered published studies that evaluated the results of an index test (procalcitonin, CRP, ESR) against the results of an acute-phase DMSA scan (conducted within 30 days of the UTI) in children aged 0 to 18 years with a culture-confirmed episode of UTI. The following cutoff values were used for the primary analysis: 0.5 ng/mL for procalcitonin, 20 mg/L for CRP and 30 mm/h for ESR. DATA COLLECTION AND ANALYSIS Two authors independently applied the selection criteria to all citations and independently abstracted data. We used the bivariate model to calculate pooled random-effects pooled sensitivity and specificity values. MAIN RESULTS A total of 24 studies met our inclusion criteria. Seventeen studies provided data for the primary analysis: six studies (434 children) included data on procalcitonin, 13 studies (1638 children) included data on CRP, and six studies (1737 children) included data on ESR (some studies had data on more than one test). The summary sensitivity estimates (95% CI) for the procalcitonin, CRP, ESR tests at the aforementioned cutoffs were 0.86 (0.72 to 0.93), 0.94 (0.85 to 0.97), and 0.87 (0.77 to 0.93), respectively. The summary specificity values for procalcitonin, CRP, and ESR tests at these cutoffs were 0.74 (0.55 to 0.87), 0.39 (0.23 to 0.58), and 0.48 (0.33 to 0.64), respectively. AUTHORS' CONCLUSIONS The ESR test does not appear to be sufficiently accurate to be helpful in differentiating children with cystitis from children with pyelonephritis. A low CRP value (< 20 mg/L) appears to be somewhat useful in ruling out pyelonephritis (decreasing the probability of pyelonephritis to < 20%), but unexplained heterogeneity in the data prevents us from making recommendations at this time. The procalcitonin test seems better suited for ruling in pyelonephritis, but the limited number of studies and the marked heterogeneity between studies prevents us from reaching definitive conclusions. Thus, at present, we do not find any compelling evidence to recommend the routine use of any of these tests in clinical practice.
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Affiliation(s)
- Nader Shaikh
- Children's Hospital of PittsburghGeneral Academic Pediatrics3414 Fifth Ave, Suite 301PittsburghPAUSA15213
| | - Jessica L Borrell
- Warren Alpert Medical School of Brown University222 Richmond StProvidenceRIUSA02903
| | - Josh Evron
- Tulane University School of Medicine1808 Robert StNew OrleansLAUSA70115
| | - Mariska MG Leeflang
- Academic Medical Center, J1B‐207‐1Department of Clinical Epidemiology and BiostatisticsP.O. Box 22700AMSTERDAMNetherlands1100 DE
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Koufadaki AM, Karavanaki KA, Soldatou A, Tsentidis C, Sourani MP, Sdogou T, Haliotis FA, Stefanidis CJ. Clinical and laboratory indices of severe renal lesions in children with febrile urinary tract infection. Acta Paediatr 2014; 103:e404-9. [PMID: 24862642 DOI: 10.1111/apa.12706] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 04/21/2014] [Accepted: 05/23/2014] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the predictive value of various clinical and laboratory parameters on the identification of acute extensive and/or multifocal renal involvement in children with febrile urinary tract infections (UTI). METHODS The medical records of 148 children (median age: 2.4 months, range: 11 days-24 months), who were admitted during a 3-year period with a first episode of febrile UTI, were analysed. Acute dimercaptosuccinic acid scintigraphy (DMSA), clinical and laboratory parameters were evaluated. RESULTS Seventy six children (51%) had abnormal findings on the acute DMSA. Of them, 20 had DMSA grade 2, while 56 had grade 3 and 4. Patients with a DMSA grade 3 and 4 were more likely to have shivering (OR 3.4), white blood count (WBC) ≥ 18 000/μL (OR 2.4), absolute neutrophil count (ANC) ≥ 9300/μL (OR 4.4), C-reactive protein (CRP) ≥ 50 mg/L (OR 2.7) and procalcitonin (PCT) ≥ 1.64 ng/mL (OR diagnostic). There was a significant difference of WBC (p = 0.004), ANC, CRP and PCT levels (p < 0.001) between children with normal and grade 2 aDMSA versus those with aDMSA grade 3 and 4. CONCLUSIONS Shivering and elevated inflammatory markers increase the risk of acute extensive and/or multifocal kidney involvement in children with febrile UTI. Procalcitonin seems to be an excellent marker of the severity of acute parenchymal involvement.
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Affiliation(s)
- AM Koufadaki
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - KA Karavanaki
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - A Soldatou
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - Ch Tsentidis
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - MP Sourani
- Second Department of Pediatrics; “Aghia Sophia” Children's Hospital; Athens Greece
| | - T Sdogou
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - FA Haliotis
- Second Department of Pediatrics; “Aghia Sophia” Children's Hospital; Athens Greece
| | - CJ Stefanidis
- Department of Pediatric Nephrology; “P. & A. Kyriakou” Children's Hospital; Athens Greece
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Xu RY, Liu HW, Liu JL, Dong JH. Procalcitonin and C-reactive protein in urinary tract infection diagnosis. BMC Urol 2014; 14:45. [PMID: 24886302 PMCID: PMC4074860 DOI: 10.1186/1471-2490-14-45] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Accepted: 05/01/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Urinary infections are a common type of pediatric disease, and their treatment and prognosis are closely correlated with infection location. Common clinical manifestations and laboratory tests are insufficient to differentiate between acute pyelonephritis and lower urinary tract infection. This study was conducted to explore a diagnostic method for upper and lower urinary tract infection differentiation. METHODS The diagnostic values of procalcitonin (PCT) and C-reactive protein (CRP) were analyzed using the receiver operating characteristic curve method for upper and lower urinary tract infection differentiation. PCT was determined using chemiluminescent immunoassay. RESULTS The PCT and CRP values in children with acute pyelonephritis were significantly higher than those in children with lower urinary tract infection (3.90 ± 3.51 ng/ml and 68.17 ± 39.42 mg/l vs. 0.48 ± 0.39 ng/ml and 21.39 ± 14.92 mg/l). The PCT values were correlated with the degree of renal involvement, whereas the CRP values failed to show such a significant correlation. PCT had a sensitivity of 90.47% and a specificity of 88% in predicting nephropathia, whereas CRP had sensitivity of 85.71% and a specificity of 48%. CONCLUSIONS Both PCT and CRP can be used for upper and lower urinary tract infection differentiation, but PCT has higher sensitivity and specificity in predicting pyelonephritis than CRP. PCT showed better results than CRP. PCT values were also correlated with the degree of renal involvement.
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Affiliation(s)
- Rui-Ying Xu
- Department of Pediatrics, Qilu Hospital of Shan Dong University, Jinan 250012, China.
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Leroy S, Fernandez-Lopez A, Nikfar R, Romanello C, Bouissou F, Gervaix A, Gurgoze MK, Bressan S, Smolkin V, Tuerlinckx D, Stefanidis CJ, Vaos G, Leblond P, Gungor F, Gendrel D, Chalumeau M. Association of procalcitonin with acute pyelonephritis and renal scars in pediatric UTI. Pediatrics 2013; 131:870-9. [PMID: 23629615 DOI: 10.1542/peds.2012-2408] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND AND OBJECTIVE Urinary tract infections (UTIs) are common childhood bacterial infections that may involve renal parenchymal infection (acute pyelonephritis [APN]) followed by late scarring. Prompt, high-quality diagnosis of APN and later identification of children with scarring are important for preventing future complications. Examination via dimercaptosuccinic acid scanning is the current clinical gold standard but is not routinely performed. A more accessible assay could therefore prove useful. Our goal was to study procalcitonin as a predictor for both APN and scarring in children with UTI. METHODS A systematic review and meta-analysis of individual patient data were performed; all data were gathered from children with UTIs who had undergone both procalcitonin measurement and dimercaptosuccinic acid scanning. RESULTS A total of 1011 patients (APN in 60.6%, late scarring in 25.7%) were included from 18 studies. Procalcitonin as a continuous, class, and binary variable was associated with APN and scarring (P < .001) and demonstrated a significantly higher (P < .05) area under the receiver operating characteristic curve than either C-reactive protein or white blood cell count for both pathologies. Procalcitonin ≥0.5 ng/mL yielded an adjusted odds ratio of 7.9 (95% confidence interval [CI]: 5.8-10.9) with 71% sensitivity (95% CI: 67-74) and 72% specificity (95% CI: 67-76) for APN. Procalcitonin ≥0.5 ng/mL was significantly associated with late scarring (adjusted odds ratio: 3.4 [95% CI: 2.1-5.7]) with 79% sensitivity (95% CI: 71-85) and 50% specificity (95% CI: 45-54). CONCLUSIONS Procalcitonin was a more robust predictor compared with C-reactive protein or white blood cell count for selectively identifying children who had APN during the early stages of UTI, as well as those with late scarring.
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Affiliation(s)
- Sandrine Leroy
- Centre for Statistics in Medicine, University of Oxford, Oxford, UK.
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Bouguila J, Khalef I, Charfeddine B, Ben Rejeb M, Chatti K, Limam K, Essabbeh H, Essoussi AS, Boughammoura L. [Comparative study of C-reactive protein and procalcitonin in the severity diagnosis of pyelonephritis in children]. ACTA ACUST UNITED AC 2013; 61:93-8. [PMID: 23481452 DOI: 10.1016/j.patbio.2013.01.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 01/11/2013] [Indexed: 10/27/2022]
Abstract
OBJECTIVE The aim of this study is to compare two biologic parameters; C-reactive protein (CRP) and procalcitonin (PCT) in the detection of acute renal lesions assessed by DMSA scintigraphy in the urinary tract infection in child. DESIGN In a prospective study, serum PCT, CRP and leukocyte counts were measured for children admitted, between January and December 2010, with a first episode of febrile urinary tract infection. RESULTS Seventy-five children were enrolled in the study. Thirty-three patients had renal lesions (group A) and 42 had a normal DMSA scintigraphy (group B). The mean PCT level was significantly higher in group A than in group B (8.81 ng/mL versus 1.7 ng/mL, P=0.01). In this study, using receiver operating characteristic (ROC) curve, we identified that the optimal cut-off value with ideal sensitivity and specificity for PCT in detection of renal lesions was 0.76 ng/mL and for CRP, it was 70 mg/L. The sensitivity, the negative predictive value and the indice of Youden of the cut-off value of PCT were significantly higher than CRP (82% versus 70%; 84% versus 70% and 0.58 versus 0.25). CONCLUSIONS This study confirmed that the serum PCT level was more sensitive and specific than the CRP in the detection of renal lesions in the first urinary tract infection in child.
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Affiliation(s)
- J Bouguila
- Service de pédiatrie, CHU Farhat Hached, avenue Ibn El Jazzar, 4000 Sousse, Tunisie.
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9
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Abstract
Over the past two decades, the body of literature on the clinical usefulness of procalcitonin (PCT) in adults has grown rapidly. Although this approach has led to increased insight, it has also prompted debate regarding its potential use in diagnosis and management of severe infection. Clinicians, however, are less familiar with the use of PCT in pediatric populations. In this review, we examine PCT as a marker of severe clinical pediatric conditions including its role in systemic inflammation, infection, and sepsis.
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Abstract
Urinary tract infections (UTIs) are one of the most common sources of bacterial infections among young febrile children. Accurate diagnosis of acute pyelonephritis (APN) and vesico-ureteral reflux (VUR) are important because of their association with renal scarring, sometimes leading to long-term complications. However, the gold standard examinations are either a DMSA scan for APN and scarring, or cystography for VUR, but both present limitations (feasibility, pain, cost, etc.). Procalcitonin, a reliable marker of bacterial infections, was demonstrated to be a good predictor of renal parenchymal involvement in the acute phase and in late renal scars, as well as of high-grade VUR. These findings need further broad validations and impact studies before being implemented into daily practice. However, procalcitonin may play a role in the complex and still debated picture of which examination should be performed after UTI in children.
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Affiliation(s)
- S Leroy
- Unité d'épidémiologie des maladies émergentes, Institut Pasteur, Paris, France.
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Leroy S, Bouissou F, Fernandez-Lopez A, Gurgoze MK, Karavanaki K, Ulinski T, Bressan S, Vaos G, Leblond P, Coulais Y, Cubells CL, Aygun AD, Stefanidis CJ, Bensman A, Da Dalt L, DaDalt L, Gardikis S, Bigot S, Gendrel D, Bréart G, Chalumeau M. Prediction of high-grade vesicoureteral reflux after pediatric urinary tract infection: external validation study of procalcitonin-based decision rule. PLoS One 2011; 6:e29556. [PMID: 22216314 PMCID: PMC3247275 DOI: 10.1371/journal.pone.0029556] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 11/30/2011] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Predicting vesico-ureteral reflux (VUR) ≥3 at the time of the first urinary tract infection (UTI) would make it possible to restrict cystography to high-risk children. We previously derived the following clinical decision rule for that purpose: cystography should be performed in cases with ureteral dilation and a serum procalcitonin level ≥0.17 ng/mL, or without ureteral dilatation when the serum procalcitonin level ≥0.63 ng/mL. The rule yielded a 86% sensitivity with a 46% specificity. We aimed to test its reproducibility. STUDY DESIGN A secondary analysis of prospective series of children with a first UTI. The rule was applied, and predictive ability was calculated. RESULTS The study included 413 patients (157 boys, VUR ≥3 in 11%) from eight centers in five countries. The rule offered a 46% specificity (95% CI, 41-52), not different from the one in the derivation study. However, the sensitivity significantly decreased to 64% (95%CI, 50-76), leading to a difference of 20% (95%CI, 17-36). In all, 16 (34%) patients among the 47 with VUR ≥3 were misdiagnosed by the rule. This lack of reproducibility might result primarily from a difference between derivation and validation populations regarding inflammatory parameters (CRP, PCT); the validation set samples may have been collected earlier than for the derivation one. CONCLUSIONS The rule built to predict VUR ≥3 had a stable specificity (ie. 46%), but a decreased sensitivity (ie. 64%) because of the time variability of PCT measurement. Some refinement may be warranted.
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Affiliation(s)
- Sandrine Leroy
- Centre for Statistics in Medicine, Oxford, United Kingdom.
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12
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Procalcitonin is a predictor for high-grade vesicoureteral reflux in children: meta-analysis of individual patient data. J Pediatr 2011; 159:644-51.e4. [PMID: 21511275 DOI: 10.1016/j.jpeds.2011.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 01/28/2011] [Accepted: 03/02/2011] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess the predictive value of procalcitonin, a serum inflammatory marker, in the identification of children with first urinary tract infection (UTI) who might have high-grade (≥3) vesicoureteral reflux (VUR). STUDY DESIGN We conducted a meta-analysis of individual data, including all series of children aged 1 month to 4 years with a first UTI, a procalcitonin (PCT) level measurement, cystograms, and an early dimercaptosuccinic acid scan. RESULTS Of the 152 relevant identified articles, 12 studies representing 526 patients (10% with VUR ≥3) were included. PCT level was associated with VUR ≥3 as a continuous (P = .001), and as a binary variable, with a 0.5 ng/mL preferred threshold (adjusted OR, 2.5; 95% CI, 1.1 to 5.4). The sensitivity of PCT ≥0.5 ng/mL was 83% (95% CI, 71 to 91) with 43% specificity rate (95% CI, 38 to 47). In the subgroup of children with a positive results on dimercaptosuccinic acid scan, PCT ≥0.5 ng/mL was also associated with high-grade VUR (adjusted OR, 4.8; 95% CI, 1.3 to 17.6). CONCLUSIONS We confirmed that PCT is a sensitive and validated predictor strongly associated with VUR ≥3, regardless of the presence of early renal parenchymal involvement in children with a first UTI.
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Leroy S, Gervaix A. Procalcitonin: a key marker in children with urinary tract infection. Adv Urol 2011; 2011:397618. [PMID: 21274426 PMCID: PMC3026964 DOI: 10.1155/2011/397618] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/20/2010] [Accepted: 12/21/2010] [Indexed: 01/12/2023] Open
Abstract
Urinary tract infections (UTIs) are the most common source of bacterial infections among young febrile children. Accurate diagnosis of acute pyelonephritis (APN) and vesicoureteral reflux (VUR) is important because of their association with renal scarring, leading in the cases to long-term complications. However, the gold standard examinations for both are either DMSA scan (for APN and scar) or cystography (for VUR) and present limitations (feasibility, pain, cost, etc.). Procalcitonin, a reliable marker of bacterial infections, was demonstrated to be a good predictor of both renal parenchymal involvement in the acute phase and late renal scars. Furthermore, it was also found to be associated with high-grade VUR and was the key tool of a clinical decision rule to predict high-grade VUR in children with a first UTI. Therefore, procalcitonin may certainly be found playing a role in the complex and still debated picture of which examination should be performed after UTI in children.
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Affiliation(s)
- Sandrine Leroy
- Centre for Statistics in Medicine, Wolfson College Annexe, University of Oxford, Linton Road, Oxford OX2 6UD, UK
- Pasteur Institute, 75015 Paris, France
| | - Alain Gervaix
- Department of Pediatrics, University Hospital of Geneva, 1211 Geneva, Switzerland
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14
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Shaikh N, Ewing AL, Bhatnagar S, Hoberman A. Risk of renal scarring in children with a first urinary tract infection: a systematic review. Pediatrics 2010; 126:1084-91. [PMID: 21059720 DOI: 10.1542/peds.2010-0685] [Citation(s) in RCA: 244] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND To our knowledge, the risk of renal scarring in children with a urinary tract infection (UTI) has not been systematically studied. OBJECTIVE To review the prevalence of acute and chronic renal imaging abnormalities in children after an initial UTI. METHODS We searched Medline and Embase for English-, French-, and Spanish-language articles using the following terms: "Technetium (99m)Tc dimercaptosuccinic acid (DMSA)," "DMSA," "dimercaptosuccinic," "scintigra*," "pyelonephritis," and "urinary tract infection." We included articles if they reported data on the prevalence of abnormalities on acute-phase (≤15 days) or follow-up (>5 months) DMSA renal scans in children aged 0 to 18 years after an initial UTI. Two evaluators independently reviewed data from each article. RESULTS Of 1533 articles found by the search strategy, 325 full-text articles were reviewed; 33 studies met all inclusion criteria. Among children with an initial episode of UTI, 57% (95% confidence interval [CI]: 50-64) had changes consistent with acute pyelonephritis on the acute-phase DMSA renal scan and 15% (95% CI: 11-18) had evidence of renal scarring on the follow-up DMSA scan. Children with vesicoureteral reflux (VUR) were significantly more likely to develop pyelonephritis (relative risk [RR]: 1.5 [95% CI: 1.1-1.9]) and renal scarring (RR: 2.6 [95% CI: 1.7-3.9]) compared with children with no VUR. Children with VUR grades III or higher were more likely to develop scarring than children with lower grades of VUR (RR: 2.1 [95% CI: 1.4-3.2]). CONCLUSIONS The pooled prevalence values provided from this study provide a basis for an evidence-based approach to the management of children with this frequently occurring condition.
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Affiliation(s)
- Nader Shaikh
- Children's Hospital of Pittsburgh, Division of General Academic Pediatrics, 3414 Fifth Ave, Pittsburgh, PA 15213-2583, USA.
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Mantadakis E, Plessa E, Vouloumanou EK, Karageorgopoulos DE, Chatzimichael A, Falagas ME. Serum procalcitonin for prediction of renal parenchymal involvement in children with urinary tract infections: a meta-analysis of prospective clinical studies. J Pediatr 2009; 155:875-881.e1. [PMID: 19850301 DOI: 10.1016/j.jpeds.2009.06.037] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 05/15/2009] [Accepted: 06/18/2009] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To determine by meta-analysis whether serum procalcitonin (PCT) is a useful marker of acute renal parenchymal involvement (RPI) in children with culture-proven urinary tract infection (UTI), as diagnosed by acute-phase DMSA (Tc-99m dimercaptosuccinic acid) renal scintigraphy. STUDY DESIGN We searched PubMed and the Cochrane Central Register of Controlled Trials for prospective studies involving children with culture-proven UTIs. Additional eligibility criteria were measurement of serum PCT at presentation and performance of DMSA scintigraphy within 14 days. RESULTS Overall, 10 studies eligible for inclusion, involving a total of 627 children, were identified. Half of these studies evaluated children with a first episode of UTI; 8 involved children with febrile UTIs. Using a cutoff value of 0.5 to 0.6 ng/mL, the pooled diagnostic odds ratio of serum PCT for UTI with RPI was 14.25 (95% confidence interval, 4.70 to 43.23). High statistical between-study heterogeneity that could mainly be attributed to 2 studies was observed. The remaining 8 studies uniformly favored PCT use. CONCLUSIONS In children with culture-proven UTI, a serum PCT value >0.5 ng/mL predicts reasonably well the presence of RPI, as evidenced by DMSA scintigraphy. PCT may aid in the identification of children with UTI, necessitating more intense evaluation and management.
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Affiliation(s)
- Elpis Mantadakis
- Department of Pediatrics, Democritus University of Thrace and University General Hospital of Alexandroupolis, Thrace, Greece
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Zaffanello M, Brugnara M, Franchini M, Fanos V. Is serum procalcitonin able to predict long-term kidney morbidity from urinary tract infections in children? Clin Chem Lab Med 2008; 46:1358-63. [PMID: 18844487 DOI: 10.1515/cclm.2008.282] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new diagnostic strategy for children with febrile urinary tract infections could be the routine use of procalcitonin assessment to identify children requiring closer follow-up since being at risk for kidney damage. A total of 11 studies were published between 1998 and 2007. Children with very high procalcitonin levels during urinary tract infections are likely to be at risk of renal damage and vesico-ureteral reflux. Therefore, the prediction of long-term renal damage showed contradictory results. However, high procalcitonin values at diagnosis and positive scintigraphic scans may suggest the need to investigate for vesico-ureteral reflux. Consequently, procalcitonin levels should be included in follow-up protocols for urinary tract infections to aid in decision making concerning scintigraphic scans and voiding cystourethrograms.
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Affiliation(s)
- Marco Zaffanello
- Department of Mother-Child and Biology-Genetics, University of Verona, Verona, Italy.
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