Evidence map›Paper›PMID 21203513›Full record

ArticlePloS one2010

Comparison of a clinical prediction rule and a LAM antigen-detection assay for the rapid diagnosis of TBM in a high HIV prevalence setting.

Vinod B Patel, Ravesh Singh, Cathy Connolly, Victoria Kasprowicz, Allimudin Zumla, Thumbi Ndungu, Keertan Dheda

Abstract read
In one paragraph

Article in PloS one, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 5 pooled it
–field-weighted citation impact
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

28 citing papers in PubMed, 5 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Urinary lipoarabinomannan for gastrointestinal tuberculosis: Another tool in the kit.Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology · 2026
    Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Fujifilm SILVAMP TB LAM Assay on Cerebrospinal Fluid for the Detection of Tuberculous Meningitis in Adults With Human Immunodeficiency Virus.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2021
    Article
  12. Challenges in the diagnosis of tuberculous meningitis.Journal of clinical tuberculosis and other mycobacterial diseases · 2020
    Article
  13. Review
  14. Review
  15. Article
  16. Article
  17. Mycobacteria-derived biomarkers for tuberculosis diagnosis.The Indian journal of medical research · 2017
    Review
  18. Tuberculosis Meningitis.Current infectious disease reports · 2017
    Review
  19. Article
  20. Article
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

7 authors.

Vinod B PatelDepartment of Neurology, University of KwaZulu Natal, Berea, South Africa.
Ravesh Singh
Cathy Connolly
Victoria Kasprowicz
Allimudin Zumla
Thumbi Ndungu
Keertan Dheda

Funding

TUBERCULOSIS SUPPLEMENTD43TW000231 · FIC · COLUMBIA UNIV NEW YORK MORNINGSIDE · PI ABDOOL KARIM, QUARRAISHA · 1993 to 2014
$13.1M
FIC NIH HHS D43 TW000231FIC NIH HHS D43TW00231
6 · The paper itself

Abstract

BACKGROUND/

objectiveThe diagnosis of tuberculous meningitis (TBM) in resource poor TB endemic environments is challenging. The accuracy of current tools for the rapid diagnosis of TBM is suboptimal. We sought to develop a clinical-prediction rule for the diagnosis of TBM in a high HIV prevalence setting, and to compare performance outcomes to conventional diagnostic modalities and a novel lipoarabinomannan (LAM) antigen detection test (Clearview-TB®) using cerebrospinal fluid (CSF).

methodsPatients with suspected TBM were classified as definite-TBM (CSF culture or PCR positive), probable-TBM and non-TBM.

resultsOf the 150 patients, 84% were HIV-infected (median [IQR] CD4 count = 132 [54; 241] cells/µl). There were 39, 55 and 54 patients in the definite, probable and non-TBM groups, respectively. The LAM sensitivity and specificity (95%CI) was 31% (17;48) and 94% (85;99), respectively (cut-point ≥ 0.18). By contrast, smear-microscopy was 100% specific but detected none of the definite-TBM cases. LAM positivity was associated with HIV co-infection and low CD4 T cell count (CD4<200 vs. >200 cells/µl; p = 0.03). The sensitivity and specificity in those with a CD4<100 cells/µl was 50% (27;73) and 95% (74;99), respectively. A clinical-prediction rule ≥ 6 derived from multivariate analysis had a sensitivity and specificity (95%CI) of 47% (31;64) and 98% (90;100), respectively. When LAM was combined with the clinical-prediction-rule, the sensitivity increased significantly (p<0.001) to 63% (47;68) and specificity remained high at 93% (82;98).

conclusionsDespite its modest sensitivity the LAM ELISA is an accurate rapid rule-in test for TBM that has incremental value over smear-microscopy. The rule-in value of LAM can be further increased by combination with a clinical-prediction rule, thus enhancing the rapid diagnosis of TBM in HIV-infected persons with advanced immunosuppression.

Indexed as

AdultAntigensCD4-Positive T-LymphocytesEnzyme-Linked Immunosorbent AssayFemaleHIV InfectionsHumansLipopolysaccharidesMaleMiddle AgedMycobacterium tuberculosisPrevalenceProspective StudiesSouth AfricaTuberculosis, MeningealAntigenslipoarabinomannanLipopolysaccharides

Identifiers

PMID21203513
PMCPMC3008727

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Registered trials

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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.