Prognostic value of neutrophil-to-lymphocyte ratio in COVID-19 patients: A systematic review and meta-analysis.
Int J Clin Pract
; 75(11): e14596, 2021 Nov.
Article
in English
| MEDLINE | ID: covidwho-1297678
ABSTRACT
BACKGROUND:
Neutrophil-to-lymphocyte ratio (NLR) is an accessible and widely used biomarker. NLR may be used as an early marker of poor prognosis in patients with COVID-19.OBJECTIVE:
To evaluate the prognostic value of the NLR in patients diagnosed with COVID-19.METHODS:
We conducted a systematic review and meta-analysis. Observational studies that reported the association between baseline NLR values (ie, at hospital admission) and severity or all-cause mortality in COVID-19 patients were included. The quality of the studies was assessed using the Newcastle-Ottawa Scale (NOS). Random effects models and inverse variance method were used for meta-analyses. The effects were expressed as odds ratios (ORs) and their 95% confidence intervals (CIs). Small study effects were assessed with the Egger's test.RESULTS:
We analysed 61 studies (n = 15 522 patients), 58 cohorts, and 3 case-control studies. An increase of one unit of NLR was associated with higher odds of severity (OR 6.22; 95%CI 4.93 to 7.84; P < .001) and higher odds of all-cause mortality (OR 12.6; 95%CI 6.88 to 23.06; P < .001). In our sensitivity analysis, we found that 41 studies with low risk of bias and moderate heterogeneity (I2 = 53% and 58%) maintained strong association between NLR values and both outcomes (severity OR 5.36; 95% CI 4.45 to 6.45; P < .001; mortality OR 10.42 95% CI 7.73 to 14.06; P = .005).CONCLUSIONS:
Higher values of NLR were associated with severity and all-cause mortality in hospitalised COVID-19 patients.
Full text:
Available
Collection:
International databases
Database:
MEDLINE
Main subject:
COVID-19
/
Neutrophils
Type of study:
Cohort study
/
Experimental Studies
/
Observational study
/
Prognostic study
/
Randomized controlled trials
/
Reviews
/
Systematic review/Meta Analysis
Limits:
Humans
Language:
English
Journal:
Int J Clin Pract
Journal subject:
Medicine
Year:
2021
Document Type:
Article
Affiliation country:
Ijcp.14596
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