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Am J Perinatol 2024; 41(S 01): e1962-e1975
DOI: 10.1055/a-2095-6729
Review Article

Meta-analysis of Cerebrospinal Fluid Cell Count and Biochemistry to Diagnose Meningitis in Infants Aged < 90 Days

Rajendra P. Anne 
1   Department of Pediatrics, Division of Neonatology, Kasturba Medical College, Manipal, Karnataka, India
,
Sourabh Dutta 
2   Department of Pediatrics, Neonatology Unit, Postgraduate Institute of Medical Education and Research, Chandigarh, India
,
Haribalakrishna Balasubramanian 
3   Department of Neonatology, Surya Hospitals, Mumbai, Maharashtra, India
,
Ashutosh N. Aggarwal 
4   Department of Pulmonology, Postgraduate Institute of Medical Education and Research, Chandigarh, India
,
Neelima Chadha
5   Dr. Tulsi Das Library, Postgraduate Institute of Medical Education and Research, Chandigarh, India
,
Praveen Kumar
2   Department of Pediatrics, Neonatology Unit, Postgraduate Institute of Medical Education and Research, Chandigarh, India
› Author Affiliations Funding None.
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Abstract

Objective Cerebrospinal fluid (CSF) white blood cell (WBC) count, protein, and glucose (cytochemistry) are performed to aid in the diagnosis of meningitis in young infants. However, studies have reported varying diagnostic accuracies. We assessed the diagnostic accuracy of CSF cytochemistry in infants below 90 days and determined the certainty of evidence.

Study Design We searched PubMed, Embase, Cochrane Library, Ovid, Cumulative Index to Nursing and Allied Health Literature (CINAHL), and Scopus databases in August 2021. We included studies that evaluated the diagnostic accuracy of CSF cytochemistry compared with CSF culture, Gram stain, or polymerase chain reaction in neonates and young infants <90 days with suspected meningitis. We pooled data using the hierarchical summary receiver operator characteristic (ROC) model.

Results Of the 10,720 unique records, 16 studies were eligible for meta-analysis, with a cumulative sample size of 31,695 (15 studies) for WBC, 12,936 (11 studies) for protein, and 1,120 (4 studies) for glucose. The median (Q1, Q3) specificities of WBC, protein, and glucose were 87 (82, 91), 89 (81, 94), and 91% (76, 99), respectively. The pooled sensitivities (95% confidence interval [CI]) at median specificity of WBC count, protein, and glucose were 90 (88, 92), 92 (89, 94), and 71% (54, 85), respectively. The area (95% CI) under ROC curves were 0.89 (0.87, 0.90), 0.87 (0.85, 0.88), and 0.81 (0.74, 0.88) for WBC, protein, and glucose, respectively. There was an unclear/high risk of bias and applicability concern in most studies. Overall certainty of the evidence was moderate. A bivariate model-based analysis to estimate the diagnostic accuracy at specific thresholds could not be conducted due to a paucity of data.

Conclusion CSF WBC and protein have good diagnostic accuracy for the diagnosis of meningitis in infants below 90 days of age. CSF glucose has good specificity but poor sensitivity. However, we could not identify enough studies to define an optimal threshold for the positivity of these tests.

Key Points

  • Median specificity of CSF leucocyte count, protein and glucose are similar in young infants.

  • At median specificity, CSF leukocyte count and protein are more sensitive than glucose.

  • Owing to inadequate data, bivariate modelling to suggest optimal diagnostic thresholds is not possible.

Keywords

cytochemistry - diagnostic accuracy - hierarchical summary ROC model - posttest probability

Authors' Contributions

S.D.: made substantial contributions to the conception and design of the work and the acquisition, analysis, and interpretation of data and revised the work critically for important intellectual content. R.P.A.: made substantial contributions to the design of the work and the acquisition, analysis, and interpretation of data and drafted the work and revised the work critically for important intellectual content. H.B.: made substantial contributions to the acquisition, analysis, and interpretation of data and revised the work critically for important intellectual content. A.N.A.: made substantial contributions to the design of the work and the acquisition, analysis, and interpretation of data and revised the work critically for important intellectual content. N.C.: made substantial contributions to data acquisition and revised the work critically for important academic content. P.K.: made significant contributions to the design of the work and the analysis and interpretation of data and revised the work critically for important intellectual content. All authors approved the version to be published and agree to be accountable for all aspects of the work in ensuring that questions related to the accuracy or integrity of any part of the work are appropriately investigated and resolved.


Supplementary Material



Publication History

Received: 19 October 2022

Accepted: 15 May 2023

Accepted Manuscript online:
17 May 2023

Article published online:
26 June 2023

© 2023. Thieme. All rights reserved.

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