Evidence map›Paper›PMID 28321490›Full record

ArticleInternational orthopaedics2017

C-reactive protein may misdiagnose prosthetic joint infections, particularly chronic and low-grade infections.

Daniel Pérez-Prieto, María E Portillo, Lluís Puig-Verdié, Albert Alier, Santos Martínez, Lluisa Sorlí, Juan P Horcajada, Joan C Monllau

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In one paragraph

Article in International orthopaedics, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed, 4 pooled it
14.4field-weighted citation impact, top 1% of its field
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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

82 citing papers in PubMed, 4 syntheses or guidelines pooled it, 159 citations in OpenAlex.

  1. Machine Learning Based Diagnostic Models for Hip and Knee Prosthetic Joint Infection: A Systematic Review.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
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  13. Diagnostic work-up in periprosthetic joint infections of the knee: can the albumin-to-globulin ratio be a screening tool?Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2025
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  17. Nomogram to predict periprosthetic joint infection after total hip arthroplasty using laboratory tests.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2025
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22 more citing papers are in PubMed but not listed here.

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

8 authors at 4 institutions in 1 country.

Daniel Pérez-PrietoOrthopaedic Department, Hospital del Mar - Universitat Autònoma de Barcelona, Barcelona, Spain. dperezprieto@parcdesalutmar.cat.
María E PortilloMicrobiology Department, Hospital de Navarra, Pamplona, Spain.
Lluís Puig-VerdiéOrthopaedic Department, Hospital del Mar - Universitat Autònoma de Barcelona, Barcelona, Spain.
Albert AlierOrthopaedic Department, Hospital del Mar - Universitat Autònoma de Barcelona, Barcelona, Spain.
Santos MartínezOrthopaedic Department, Hospital del Mar - Universitat Autònoma de Barcelona, Barcelona, Spain.
Lluisa SorlíInfectious Diseases Department, Hospital del Mar, Barcelona, Spain.
Juan P HorcajadaInfectious Diseases Department, Hospital del Mar, Barcelona, Spain.
Joan C MonllauOrthopaedic Department, Hospital del Mar - Universitat Autònoma de Barcelona, Barcelona, Spain.
Universitat Autònoma de Barcelona · ESHospital Del Mar · ESHospital Universitario Dexeus · ESUniversidad de Navarra · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPeriprosthetic tissue cultures, sonication and synovial fluid cultures remain the gold standard for prosthetic joint infection (PJI) diagnosis. However, some 15-20% culture-negative PJI are still reported. Therefore, there is the need for other diagnostic criteria. One point of concern relative to the different definitions of PJI is as to the inclusion of the c-reactive protein (CRP) and the erythrocyte sedimentation rate (ESR) as diagnostic criteria for PJI despite them being non-specific inflammatory blood tests. PURPOSE: The purpose of the present study was to determine the relevance of CRP and the ESR in the diagnosis of PJI.

methodsAll PJI with positive cultures over a two-year period in two hospitals were reviewed. The main variables of the present study were the type of prosthesis and the CRP level. More information was recorded in those patients with normal CRP: radiographs, physical examination records and the ESR.

resultsSeventy-three patients were included in study. Pre-operative CRP levels were normal (lower than 0.8 mg/dl) in 23 patients, representing 32% of all PJI with positive cultures. Low virulence micro-organisms, 12 coagulase-negative staphylococci and four P. acnes, grew in most of them. They represented 70% of all PJI with normal CRP levels. In addition, 17 patients (23% of all PJI with positive cultures) had a normal ESR, a normal physical examination (they only presented with pain) and no clear loosening was observed in the radiographs.

conclusionsPer the American Association of Orthopaedic Surgeons (AAOS) guidelines or the Musculoskeletal Infection Society (MSIS), 23% of the patients in the present study with PJI would never have been identified. Blood inflammatory markers such as the CRP level and ESR may not be accurate as diagnostic tools in PJI, particularly to identify low-grade and chronic PJI.

Indexed as

Blood SedimentationAgedArthroplasty, ReplacementBacteriaBiomarkersCandidaChronic DiseaseC-Reactive ProteinDiagnostic ErrorsFemaleHumansMaleMicrobiological TechniquesMiddle AgedProsthesis-Related InfectionsRetrospective StudiesBiomarkersC-Reactive ProteinChronic PJICRPCulture-negative PJILow-grade PJIProsthetic joint infection

Identifiers

PMID28321490
OpenAlexW2597814169

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.