Evidence map›Paper›PMID 41495735›Full record

SynthesisBMC pulmonary medicine2026

Neutrophil-to-lymphocyte ratio for predicting disease severity and outcomes in children with Mycoplasma pneumoniae pneumonia: a systematic review and meta-analysis.

Ying Jiang, Jiankun Liu

Abstract readSystematic ReviewMeta-Analysis
In one paragraph

Synthesis in BMC pulmonary medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
–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

6 citing papers in PubMed.

  1. Article
  2. Article
  3. Association between normalizedTranslational pediatrics · 2026
    Article
  4. Article
  5. Article
  6. 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

2 authors.

Ying JiangDepartment of Pediatrics, Sanming Second Hospital, Fujian, 366000, China. 957860579@qq.com.
Jiankun LiuDepartment of Imaging, Sanming Second Hospital, Fujian, 366000, China.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo systematically evaluate the diagnostic and prognostic value of the neutrophil-to-lymphocyte ratio (NLR) in children with Mycoplasma pneumoniae pneumonia (MPP).

methodsA comprehensive search of PubMed, Embase, Web of Science, Cochrane Library, Scopus, Wanfang, and CNKI was performed from inception to November 1, 2025. Observational studies assessing the association between NLR and the occurrence of MPP, refractory MPP (RMPP), severe MPP (SMPP), or poor prognosis in children were included. Two reviewers independently screened the literature, extracted data, and assessed the risk of bias. Random-effects models were applied to pool odds ratios (OR) and standardized mean differences (SMD) with 95% confidence intervals (CI). Meta-regression analyses were conducted to explore potential sources of heterogeneity.

resultsTwenty-six studies involving 7,013 participants were included. Elevated NLR was significantly associated with the occurrence of MPP (6 studies, SMD = 1.91, 95% CI: 1.07–2.76), RMPP (5 studies, OR = 2.15, 95% CI: 1.44–3.21; 7 studies, SMD = 0.82, 95% CI: 0.64–1.00), SMPP (4 studies, OR = 1.41, 95% CI: 1.27–1.56; 9 studies, SMD = 1.36, 95% CI: 0.79–1.93), and poor prognosis (8 studies, OR = 1.55, 95% CI: 1.30–1.84; 10 studies, SMD = 1.13, 95% CI: 0.74–1.53). Meta-regression indicated that geographic region accounted for most heterogeneity in MPP analyses (R²= 70.0%), while sample size contributed substantially to heterogeneity in SMPP (R²= 51.2%) and adverse outcome analyses (R²= 60.5%). Sensitivity analyses confirmed the robustness of the findings.

conclusionsAs an adjunct to clinical assessment and etiological testing, NLR shows potential as a supportive biomarker for the early risk stratification and prognosis monitoring of pediatric MPP. Substantial heterogeneity was observed across continuous analyses, and most included studies originated from East Asia, which may limit generalizability. Its simplicity and low cost suggest possible clinical utility, particularly in resource-limited settings.

Indexed as

LymphocytesNeutrophilsPneumonia, MycoplasmaChildHumansLymphocyte CountMycoplasma pneumoniaePredictive Value of TestsPrognosisSeverity of Illness IndexChildrenMeta-analysisMycoplasma pneumoniae pneumoniaNeutrophil-to-lymphocyte ratioPrognosisSystematic review

Identifiers

PMID41495735
PMCPMC12870814

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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.