C-Reactive Protein

Objectives: To examine whether patients with multisystem inflammatory syndrome in children (MIS-C) demonstrated well-defined clinical features distinct from other febrile outpatients, given the difficulties of seeing acute care visits during the severe acute respiratory syndrome coronavirus 2 pandemic and the risks associated with both over- and underdiagnosis of MIS-C.

Study design: This case-controlled study compared patients diagnosed with and treated for MIS-C at a large urban children's hospital with patients evaluated for fever at outpatient acute care visits during the peak period of MIS-C. Symptomatology and available objective data were extracted. Comparisons were performed using t tests with corrections for multiple comparisons, and multivariable logistic regression to obtain ORs.

Results: We identified 44 patients with MIS-C between April 16 and June 10, 2020. During the same period, 181 pediatric patients were evaluated for febrile illnesses in participating outpatient clinics. Patients with MIS-C reported greater median maximum reported temperature height (40°C vs 38.9, P < .0001), and increased frequency of abdominal pain (OR 12.5, 95% CI [1.65-33.24]), neck pain (536.5, [2.23-129,029]), conjunctivitis (31.3, [4.6-212.8]), oral mucosal irritation (11.8, [1.4-99.4]), extremity swelling or rash (99.9, [5-1960]), and generalized rash (7.42, [1.6-33.2]). Patients with MIS-C demonstrated lower absolute lymphocyte (P < .0001) and platelet counts (P < .05) and greater C-reactive protein concentrations (P < .001).

Conclusions: Patients treated for MIS-C due to concern for potential cardiac injury show combinations of features distinct from other febrile patients seen in outpatient clinics during the same period.

Author/s:

Carlin, Rebecca F., Fischer, Avital M., Pitlowsky, Zachary, Abel, Dori, Sewell, Taylor B., Landau, Erika G., Caddle, Steve, Robbins-Milne, Laura, Boneparth, Alexis, Milner, Josh D., Cheung, Eva W., Zachariah, Philp, Stockwell, Mellissa S., Anderson, Brett R., Gorelik, Mark

Diagnostic Accuracy of Symptoms, Physical Signs, and Laboratory Tests for Giant Cell Arteritis: A Systematic Review and Meta-analysis

Brian Desmarais — Thu, 20 Aug 2020 15:06:27 +0000

Date Added:

August 20, 2020

Journal/Publication:

JAMA Internal Medicine

Publication Date:

August 17, 2020

URL:

Diagnostic Accuracy of Symptoms, Physical Signs, and Laboratory Tests for Giant Cell Arteritis: A Systematic Review and Meta-analysis

Type:

Meta-analyses, Reviews, and Guidelines

Format:

Article

DOI (1):

10.1001/jamainternmed.2020.3050.

MeSH

Information Storage and Retrieval

This meta-analysis involving 68 studies calculated the likelihood ratios of various signs and symptoms of temporal arteritis (giant cell arteritis), which could be helpful when deciding when to refer patients for temporal artery biopsy.. James W. Mold, MD, MPH

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Abstract

Importance: Current clinical guidelines recommend selecting diagnostic tests for giant cell arteritis (GCA) based on pretest probability that the disease is present, but how pretest probability should be estimated remains unclear.

Objective: To evaluate the diagnostic accuracy of symptoms, physical signs, and laboratory tests for suspected GCA.

Data sources: PubMed, EMBASE, and the Cochrane Database of Systematic Reviews were searched from November 1940 through April 5, 2020.

Study selection: Trials and observational studies describing patients with suspected GCA, using an appropriate reference standard for GCA (temporal artery biopsy, imaging test, or clinical diagnosis), and with available data for at least 1 symptom, physical sign, or laboratory test.

Data extraction and synthesis: Screening, full text review, quality assessment, and data extraction by 2 investigators. Diagnostic test meta-analysis used a bivariate model.

Main outcome(s) and measures: Diagnostic accuracy parameters, including positive and negative likelihood ratios (LRs).

Results: In 68 unique studies (14 037 unique patients with suspected GCA; of 7798 patients with sex reported, 5193 were women [66.6%]), findings associated with a diagnosis of GCA included limb claudication (positive LR, 6.01; 95% CI, 1.38-26.16), jaw claudication (positive LR, 4.90; 95% CI, 3.74-6.41), temporal artery thickening (positive LR, 4.70; 95% CI, 2.65-8.33), temporal artery loss of pulse (positive LR, 3.25; 95% CI, 2.49-4.23), platelet count of greater than 400 × 103/μL (positive LR, 3.75; 95% CI, 2.12-6.64), temporal tenderness (positive LR, 3.14; 95% CI, 1.14-8.65), and erythrocyte sedimentation rate greater than 100 mm/h (positive LR, 3.11; 95% CI, 1.43-6.78). Findings that were associated with absence of GCA included the absence of erythrocyte sedimentation rate of greater than 40 mm/h (negative LR, 0.18; 95% CI, 0.08-0.44), absence of C-reactive protein level of 2.5 mg/dL or more (negative LR, 0.38; 95% CI, 0.25-0.59), and absence of age over 70 years (negative LR, 0.48; 95% CI, 0.27-0.86).

Conclusions and relevance: This study identifies the clinical and laboratory features that are most informative for a diagnosis of GCA, although no single feature was strong enough to confirm or refute the diagnosis if taken alone. Combinations of these symptoms might help direct further investigation, such as vascular imaging, temporal artery biopsy, or seeking evaluation for alternative diagnoses.

Author/s:

van der Geest, Kornelis S. M., Sandovici , S., Brouwer, Elisabeth, Mackie, S.L.

C-Reactive Protein Testing to Guide Antibiotic Prescribing for COPD Exacerbations

John Bayhi — Thu, 11 Jul 2019 19:47:05 +0000

Date Added:

July 11, 2019

Journal/Publication:

New England Journal of Medicine

Publisher:

Massachusetts Medical Society

Publication Date:

July 11, 2019

Issue:

Volume:

381

Pages:

111-120

URL:

C-Reactive Protein Testing to Guide Antibiotic Prescribing for COPD Exacerbations

Type:

Clinical Research Results

Format:

Article

DOI (1):

10.1056/NEJMoa1803185

Keywords

C-reactive protein

primary care

chronic obstructive pulmonary disease

copd

CRP

randomized control trial

antibiotics

PMID (1):

31291514

MeSH

Point-Of-Care Testing

anti-bacterial agents

technology assessment, biomedical

Wales

follow-up studies

random allocation

pulmonary disease, chronic obstructive

health status

Surveys and Questionnaires

primary health care

referral and consultation

England

In adults with acute COPD exacerbations, serum CRP-based decision-making led to fewer antibiotic prescriptions with no adverse consequences. Physicians and patients in the intervention group were advised to consider all clinically relevant information. However, they were advised to consider that CRP levels < 4omg/L indicated that antibiotics were probably not needed, levels between 20 and 40 mg/L were indeterminant, and levels above 40 mg/L suggested that antibiotics were probably necessary. Note: In this study, physicians were able to obtain CRP levels at the point of care. James W. Mold, MD, MPH

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BACKGROUND

Point-of-care testing of C-reactive protein (CRP) may be a way to reduce unnecessary use of antibiotics without harming patients who have acute exacerbations of chronic obstructive pulmonary disease (COPD).

METHODS

We performed a multicenter, open-label, randomized, controlled trial involving patients with a diagnosis of COPD in their primary care clinical record who consulted a clinician at 1 of 86 general medical practices in England and Wales for an acute exacerbation of COPD. The patients were assigned to receive usual care guided by CRP point-of-care testing (CRP-guided group) or usual care alone (usual-care group). The primary outcomes were patient-reported use of antibiotics for acute exacerbations of COPD within 4 weeks after randomization (to show superiority) and COPD-related health status at 2 weeks after randomization, as measured by the Clinical COPD Questionnaire, a 10-item scale with scores ranging from 0 (very good COPD health status) to 6 (extremely poor COPD health status) (to show noninferiority).

RESULTS

A total of 653 patients underwent randomization. Fewer patients in the CRP-guided group reported antibiotic use than in the usual-care group (57.0% vs. 77.4%; adjusted odds ratio, 0.31; 95% confidence interval [CI], 0.20 to 0.47). The adjusted mean difference in the total score on the Clinical COPD Questionnaire at 2 weeks was −0.19 points (two-sided 90% CI, −0.33 to −0.05) in favor of the CRP-guided group. The antibiotic prescribing decisions made by clinicians at the initial consultation were ascertained for all but 1 patient, and antibiotic prescriptions issued over the first 4 weeks of follow-up were ascertained for 96.9% of the patients. A lower percentage of patients in the CRP-guided group than in the usual-care group received an antibiotic prescription at the initial consultation (47.7% vs. 69.7%, for a difference of 22.0 percentage points; adjusted odds ratio, 0.31; 95% CI, 0.21 to 0.45) and during the first 4 weeks of follow-up (59.1% vs. 79.7%, for a difference of 20.6 percentage points; adjusted odds ratio, 0.30; 95% CI, 0.20 to 0.46). Two patients in the usual-care group died within 4 weeks after randomization from causes considered by the investigators to be unrelated to trial participation.

CONCLUSIONS

CRP-guided prescribing of antibiotics for exacerbations of COPD in primary care clinics resulted in a lower percentage of patients who reported antibiotic use and who received antibiotic prescriptions from clinicians, with no evidence of harm. (Funded by the National Institute for Health Research Health Technology Assessment Program; PACE Current Controlled Trials number, ISRCTN24346473.)

Author/s:

Butler, Christopher C., Gillespie, David, White, Patrick, Bates, Janine, Lowe, Rachel, Thomas-Jones, Emma, Wootton, Mandy, Hood, Kerenza, Phillips, Rhiannon, Melbye, M., Llor, Carl, Cals, Jochen W.L.