PMID- 34597379 OWN - NLM STAT- MEDLINE DCOM- 20220422 LR - 20220422 IS - 2576-9456 (Print) IS - 2475-7241 (Linking) VI - 7 IP - 2 DP - 2022 Mar 2 TI - Performance of C-Reactive Protein, Procalcitonin, TAT Complex, and Factor VIII in Addition to D-Dimer in the Exclusion of Venous Thromboembolism in Primary Care Patients. PG - 444-455 LID - 10.1093/jalm/jfab094 [doi] AB - BACKGROUND: In primary care, D-dimer-combined with a clinical assessment-is recommended for ruling-out venous thromboembolism (VTE). However, D-dimer testing frequently yields false-positive results, notably in the elderly, and the search for novel biomarkers thus continues. We assessed the added diagnostic value of 4 promising laboratory tests. METHODS: Plasma samples from 256 primary care patients suspected of VTE were collected. We explored added value (beyond D-dimer) of C-reactive protein (CRP), procalcitonin (PCT), thrombin-antithrombin III complex (TAT-c), and factor VIII (FVIII). Diagnostic performance of these biomarkers was assessed univariably and by estimating their area under the receiver operating curve (AUC). Added diagnostic potential beyond D-dimer testing was assessed using multivariable logistic regression. RESULTS: Plasma samples of 237 VTE-suspected patients were available for analysis-36 patients (25%) confirmed deep vein thrombosis, 11 patients (12%) pulmonary embolism. Apart from D-dimer, only CRP, and FVIII levels appeared to be higher in patients with VTE compared to patients without VTE. The AUCs for these 3 markers were 0.76 (95% CI: 0.69-0.84) and 0.75 (95% CI: 0.68-0.83), respectively, whereas the AUC for D-dimer was 0.90 (95% CI: 0.86-0.94). Combining these biomarkers in a multivariable logistic model with D-dimer did not improve these AUCs meaningfully. CONCLUSIONS: In our dataset, we were unable to demonstrate any added diagnostic performance beyond D-dimer testing of novel biomarkers in patients suspected of VTE in primary care. As such, D-dimer testing appears to remain the best choice in the exclusion of clinically suspected VTE in this setting. TRIAL REGISTRATION: Netherlands Trial Register NL5974. (METC protocol number: 16-356/M; NL56475.041.16.). CI - (c) American Association for Clinical Chemistry 2021. FAU - Heerink, Jorn S AU - Heerink JS AUID- ORCID: 0000-0002-3802-4302 AD - Department of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, the Netherlands. AD - Department of Health Technology and Services Research, Technical Medical Centre, University of Twente, Enschede, the Netherlands. FAU - Gemen, Eugenie AU - Gemen E AD - Department of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, the Netherlands. FAU - Oudega, Ruud AU - Oudega R AD - Department of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, the Netherlands. AD - Julius Centre for Health Sciences and General Practice, University Medical Centre Utrecht, the Netherlands. FAU - Geersing, Geert-Jan AU - Geersing GJ AD - Julius Centre for Health Sciences and General Practice, University Medical Centre Utrecht, the Netherlands. FAU - Hopstaken, Rogier AU - Hopstaken R AD - Star-shl Diagnostic Centres, Etten-Leur, the Netherlands. FAU - Kusters, Ron AU - Kusters R AUID- ORCID: 0000-0003-1279-5448 AD - Department of Clinical Chemistry and Haematology, Jeroen Bosch Hospital, 's-Hertogenbosch, the Netherlands. AD - Department of Health Technology and Services Research, Technical Medical Centre, University of Twente, Enschede, the Netherlands. LA - eng SI - NTR/NL5974 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Appl Lab Med JT - The journal of applied laboratory medicine JID - 101693884 RN - 0 (Biomarkers) RN - 0 (Fibrin Fibrinogen Degradation Products) RN - 0 (Procalcitonin) RN - 0 (fibrin fragment D) RN - 9001-27-8 (Factor VIII) RN - 9007-41-4 (C-Reactive Protein) SB - IM MH - Aged MH - Biomarkers MH - C-Reactive Protein MH - Factor VIII MH - Fibrin Fibrinogen Degradation Products MH - Humans MH - Primary Health Care MH - Procalcitonin MH - *Venous Thromboembolism/diagnosis OTO - NOTNLM OT - C-reactive protein OT - D-dimer OT - TAT complex OT - factor VIII OT - procalcitonin OT - venous thromboembolism EDAT- 2021/10/02 06:00 MHDA- 2022/04/23 06:00 CRDT- 2021/10/01 17:19 PHST- 2021/04/02 00:00 [received] PHST- 2021/06/28 00:00 [accepted] PHST- 2021/10/02 06:00 [pubmed] PHST- 2022/04/23 06:00 [medline] PHST- 2021/10/01 17:19 [entrez] AID - 6379042 [pii] AID - 10.1093/jalm/jfab094 [doi] PST - ppublish SO - J Appl Lab Med. 2022 Mar 2;7(2):444-455. doi: 10.1093/jalm/jfab094.