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Kavsak PA, Cerasuolo JO, Ko DT, Ma J, Sherbino J, Mondoux SE, Clayton N, Hill SA, McQueen M, Griffith LE, Mehta SR, Perez R, Seow H, Devereaux PJ, Worster A. Using the clinical chemistry score in the emergency department to detect adverse cardiac events: a diagnostic accuracy study. CMAJ Open 2020; 8:E676-E684. [PMID: 33139388 PMCID: PMC7608943 DOI: 10.9778/cmajo.20200047] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND The ability to rule out or in a major adverse cardiac event (MACE) in patients with suspected acute coronary syndrome at emergency department (ED) presentation would be beneficial to patient care and the health care system. The clinical chemistry score (CCS) was evaluated in this context. METHODS This diagnostic accuracy study evaluated 2 different ED cohorts with suspected acute coronary syndrome. For patients in cohort 1, who presented to the ED of 3 hospitals in Hamilton, Ontario, between May and August 2013, retrospective measurements were taken using the Ortho Clinical Diagnostics high-sensitivity cardiac troponin I (hs-cTnI) assay; for patients in cohort 2, who presented to the ED of the same 3 hospitals in Hamilton between November 2012 and February 2013, an ED cardiac presentation blood test panel was performed with the Abbott Diagnostics hs-cTnI assay. The sensitivity and specificity of the CCS (cut-offs of ≥ 1 and 5) and hs-cTnI alone (published cut-offs) were compared for MACE (composite of death, myocardial infarction, unstable angina, revascularization) at 30 days for both cohorts and at 90 days for cohort 2. RESULTS The incidence of MACE at 30 days was higher in cohort 1 (n = 1058) (19.4%, 95% confidence interval [CI] 16.8%-22.2%) than in cohort 2 (n = 5974) (14.6%, 95% CI 13.6%-15.6%). In cohort 1, a CCS of 1 or above yielded a sensitivity of 99.5% (95% CI 97.3%-99.9%). The sensitivity with an Ortho hs-cTnI cut-off of 1 ng/L or above was 91.2% (95% CI 86.5%-95.7%). The specificity of a CCS of 5 (97.8%, 95% CI 96.5%-98.7%) was higher than when the overall 99th-percentile cut-off for the Ortho hs-cTnI assay (> 11 ng/L; 90.1%, 95% CI 87.9%-92.0%) was used. A similar pattern was observed in cohort 2 at 30 days and persisted at 90 days with the Abbott hs-cTnI assay. INTERPRETATION The CCS derived with 2 different hs-cTnI assays and ED populations yielded higher sensitivity and specificity estimates for MACE than hs-cTnI alone. An intervention study is needed to evaluate the impact of the CCS at both the patient and hospital levels. TRIAL REGISTRATION ClinicalTrials.gov, no. NCT01994577.
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Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont.
| | - Joshua O Cerasuolo
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Dennis T Ko
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Jinhui Ma
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Jonathan Sherbino
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Shawn E Mondoux
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Natasha Clayton
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Stephen A Hill
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Matthew McQueen
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Lauren E Griffith
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Shamir R Mehta
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Richard Perez
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Hsien Seow
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - P J Devereaux
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
| | - Andrew Worster
- Department of Pathology and Molecular Medicine (Kavsak, Hill, McQueen), McMaster University; ICES McMaster (Cerasuolo, Perez, Seow), Faculty of Health Sciences, McMaster University, Hamilton, Ont.; ICES (Ko), Toronto, Ont.; Department of Health Research Methods, Evidence, and Impact (Ma, Griffith); Division of Emergency Medicine (Sherbino, Mondoux, Worster); Department of Medicine (Clayton); Division of Cardiology, and Population Health Research Institute (Mehta, Devereaux), McMaster University, Hamilton, Ont
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Kavsak PA, Mondoux SE, Sherbino J, Ma J, Clayton N, Hill SA, McQueen M, Mehta SR, Griffith LE, Devereaux PJ, Worster A. Clinical evaluation of Ortho Clinical Diagnostics high-sensitivity cardiac Troponin I assay in patients with symptoms suggestive of acute coronary syndrome. Clin Biochem 2020; 80:48-51. [PMID: 32304695 DOI: 10.1016/j.clinbiochem.2020.04.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/14/2020] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND As more companies obtain regulatory approval for high-sensitivity cardiac troponin (hs-cTn) assays there is an urgent need for independent analytical and clinical evaluations. To this end, we have evaluated Ortho Clinical Diagnostics' hs-cTnI assay and compared it to their contemporary cTnI-ES assay in emergency department (ED) patients with suspected acute coronary syndrome (ACS). METHODS The study cohort consisted of ED patients (n = 906) with symptoms suggestive of ACS who had Ortho hs-cTnI and cTnI-ES results at presentation and 3 h (with calculated delta (0-3 h) defined as the absolute concentration difference between paired results). The primary composite outcome was 7-day myocardial infarction (MI) or cardiovascular death, with secondary analyses performed for 7-day MI and index-MI. Analytical imprecision testing (i.e., coefficient of variation; CV), receiver-operating characteristic (ROC) curve analyses with area under the curve (AUC), and diagnostic parameters (sensitivity/specificity/predictive values) were calculated. RESULTS The hs-cTnI assay had superior precision compared to the cTnI-ES assay below 5 ng/L in EDTA plasma (hs-cTnI CV ≤ 15% versus cTnI-ES CV ≥ 85%). The AUCs were higher for hs-cTnI as compared to cTnI-ES at 0 h (0.88 vs. 0.85), 3 h (0.94 vs. 0.92), and the delta (0-3 h) value (0.91 vs. 0.85) for the primary composite outcome (p < 0.05). At 3 h, the sensitivity/specificity for index-MI was ≥97%/≥82%, for 7-day MI was ≥89%/≥84%, and for the primary composite outcome was ≥90%/≥85% using the manufacturer's sex-specific 99th-percentile cutoffs. CONCLUSION The Ortho hs-cTnI assay has superior analytical and clinical performance over their contemporary cTnI-ES assay in evaluating ED patients with symptoms suggestive of ACS.
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Affiliation(s)
- Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada.
| | - Shawn E Mondoux
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
| | - Jonathan Sherbino
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
| | - Jinhui Ma
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Natasha Clayton
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Stephen A Hill
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Matthew McQueen
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Shamir R Mehta
- Division of Cardiology, and Population Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - Lauren E Griffith
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - P J Devereaux
- Division of Cardiology, and Population Health Research Institute, McMaster University, Hamilton, ON, Canada
| | - Andrew Worster
- Division of Emergency Medicine, McMaster University, Hamilton, ON, Canada
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Lau G, Koh M, Kavsak PA, Schull MJ, Armstrong DWJ, Udell JA, Austin PC, Wang X, Ko DT. Clinical outcomes for chest pain patients discharged home from emergency departments using high-sensitivity versus conventional cardiac troponin assays. Am Heart J 2020; 221:84-94. [PMID: 31954328 DOI: 10.1016/j.ahj.2019.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 12/06/2019] [Indexed: 12/12/2022]
Abstract
BACKGROUND High-sensitivity cardiac troponin (hs-cTn) assays enhance detection of lower circulating troponin concentrations, but the impact on outcomes in clinical practice is unclear. Our objective was to compare outcomes of chest pain patients discharged from emergency departments (EDs) using hs-cTn and conventional troponin (cTn) assays. METHODS We conducted an observational study of chest pain patients aged 40-105 years who presented to an ED from April 1, 2013, to March 31, 2017, and were discharged home. We compared 30-day and 1-year outcomes of EDs that used hs-cTn versus cTn assays. The primary outcome was a composite of all-cause death, myocardial infarction or unstable angina. Comparisons were conducted with (1) no adjustment; (2) adjustment for demographic, socioeconomic, and hospital characteristics; and (3) full clinical adjustment. RESULTS Among the 394,910 patients, 62,138 (15.7%) were evaluated at hs-cTn EDs and 332,772 (84.3%) were evaluated at cTn EDs. Patients discharged from hs-cTn EDs were less likely to have diabetes, hypertension, or prior heart disease. At 30 days, the unadjusted primary outcome rate was lower in hs-cTn EDs (0.9% vs 1.0%, P < .001). The 30-day hazard ratios for the primary outcome were 0.84 (95% CI 0.77-0.92) for no adjustment and 0.98 (95% CI 0.88-1.08) for full adjustment. Over 1 year, patients discharged from hs-cTn EDs had significantly fewer primary outcomes (3.7% vs 4.1%, P < .001) and lower hazard ratio (0.93; 95% CI 0.89-0.98) even after full adjustment. CONCLUSIONS Hs-cTn testing was associated with a significantly lower adjusted hazard of myocardial infarction, angina, and all-cause hospitalization at 1 year but not 30 days.
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Affiliation(s)
- Geoffrey Lau
- ICES, Toronto, Ontario, Canada; Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Peter A Kavsak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Michael J Schull
- ICES, Toronto, Ontario, Canada; Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Jacob A Udell
- ICES, Toronto, Ontario, Canada; Women's College Hospital, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Dennis T Ko
- ICES, Toronto, Ontario, Canada; Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Schulich Heart Center, Sunnybrook Health Sciences, University of Toronto, Toronto, Ontario, Canada.
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