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Head & Neck Dec 2018Thrombocytosis is associated with the prognosis of various types of cancer. The purpose of this study was to quantify the prognostic impact of platelet count and... (Meta-Analysis)
Meta-Analysis
BACKGROUND
Thrombocytosis is associated with the prognosis of various types of cancer. The purpose of this study was to quantify the prognostic impact of platelet count and platelet-lymphocyte ratio (PLR) in head and neck squamous cell carcinoma (HNSCC).
METHODS
We systematically searched electronic databases and identified articles reporting an association between platelet count or PLR and HNSCC prognosis. Hazard ratios (HRs) and 95% confidence intervals (CIs) for overall survival (OS) were extracted, and the pooled HRs were estimated using random effect models.
RESULTS
Eight studies that enrolled 4096 patients and 9 studies that enrolled 2327 patients were included in the platelet count and PLR analyses, respectively. A platelet count greater than the cutoff value was associated with poor OS (HR 1.81; 95% CI 1.16-2.82) and any PLR greater than the cutoff value was associated with poor OS (HR 1.64; 95% CI 1.13-2.37).
CONCLUSION
Elevated platelet count and PLR are associated with poor prognosis in patients with HNSCC.
Topics: Head and Neck Neoplasms; Humans; Lymphocyte Count; Platelet Count; Prognosis; Publication Bias; Squamous Cell Carcinoma of Head and Neck
PubMed: 30102821
DOI: 10.1002/hed.25366 -
OncoTargets and Therapy 2018The relationship between platelet counts and pancreatic cancer as a prognostic factor has been reported in many studies. We aimed to evaluate the prognostic value of...
BACKGROUND
The relationship between platelet counts and pancreatic cancer as a prognostic factor has been reported in many studies. We aimed to evaluate the prognostic value of platelet counts in predicting the prognosis of pancreatic cancer patients.
METHODS
We searched PubMed, Medline, EMBASE, and Google Scholar for eligible studies up to May 2017. Information about the characteristics of the study and relevant outcomes was extracted. A meta-analysis was performed to analyze the prognostic value of platelet counts using the hazard ratio (HR) and 95% confidence intervals (CIs).
RESULTS
A total of 1,756 patients in 13 retrospective studies were included. The pooled HR of 1.51 (95% CI: 1.20-1.90, <0.001) showed that patients with elevated platelet counts were expected to have poor overall survival after treatment. Subgroup analysis showed that prognostic value of platelet levels was stronger in patients who received surgical resection (HR =1.60, 95% CI: 1.09-2.34, =0.02), followed by patients who received palliative therapy (HR =1.46, 95% CI: 1.03-2.06, =0.03).
CONCLUSION
Platelet counts could be a useful prognostic marker for pancreatic cancer. Patients with high platelet counts are expected to have poor survival.
PubMed: 29317834
DOI: 10.2147/OTT.S147715 -
European Journal of Pediatrics Mar 2021Patent ductus arteriosus (PDA), one of the most common disorders in newborns, is associated with many complications in premature infants such as respiratory distress... (Meta-Analysis)
Meta-Analysis Review
Patent ductus arteriosus (PDA), one of the most common disorders in newborns, is associated with many complications in premature infants such as respiratory distress syndrome (RDS) and bronchopulmonary dysplasia (BPD). However, the diagnosis of hemodynamically significant patent ductus arteriosus (hsPDA) is still an ongoing debate. The relationship between platelet parameters and hsPDA has been explored in many studies over the last decade, but there is still no definite conclusion. We aim to explain the relationship between platelet parameters and hsPDA through this meta-analysis. Therefore, we used PubMed, Embase, the Cochrane Library, and Web of Science databases as well as the Google Scholar to search for studies up to May 2020. Three reviewers independently screened the articles, evaluated the quality of the articles, and collected the data. The random-effects model and fixed-effects model were used to evaluate pooled results. We used the I-square (I) test to examine heterogeneity and the funnel plot; Egger's test and meta-regression analysis were used to test for publication bias. Influence analysis was also carried out in this study. Stata version 12.0 software was used for data analysis. Fourteen studies, which included 3330 newborns, were extracted from 986 studies. The weighted mean difference (WMD) of the platelet count was - 17.98 (p < 0.001), the platelet distribution width (PDW) was 0.27 (p = 0.266), the mean platelet volume (MPV) was 0.01 (p = 0.958), the plateletcrit (PCT) was - 0.03 (p < 0.001), and the platelet mass was - 150.10 (p = 0.001).Conclusion: Platelet count, PCT, and platelet mass of the first 3 days of life are potentially helpful in identifying premature infants at risk of hsPDA. More prospective studies on the relationship between different degrees of thrombocytopenia and platelet function and hsPDA should be conducted. What is Known: • Platelets are involved in the formation of thrombi during closure of the arterial duct. • The diagnosis of hsPDA by Doppler echocardiography and clinical signs is not precise enough. What is New: • Preterm newborns with hsPDA in the first week of life demonstrated a significant reduction in platelet count, platelet mass, and plateletcrit in the first 3 days of life. • No significant difference was shown between hsPDA and non-hsPDA infants in platelet distribution width and mean platelet volume in the first 3 days of life.
Topics: Ductus Arteriosus, Patent; Humans; Infant; Infant, Newborn; Infant, Premature; Infant, Premature, Diseases; Prospective Studies; Respiratory Distress Syndrome, Newborn
PubMed: 32949292
DOI: 10.1007/s00431-020-03802-5 -
Platelets Oct 2020Correlation between platelet indices and chronic inflammatory arthritis (CIA) remains a moot point today. This meta-analysis aimed to evaluate whether platelet (PLT)... (Meta-Analysis)
Meta-Analysis
Correlation between platelet indices and chronic inflammatory arthritis (CIA) remains a moot point today. This meta-analysis aimed to evaluate whether platelet (PLT) count, mean platelet volume (MPV) and platelet distribution width (PDW) associated with rheumatoid arthritis (RA), ankylosing spondylitis (AS) and psoriatic arthritis (PsA). A systematic literature search was performed in PubMed, EMBASE, and Web of Science up to August 2019. Pooled standardized mean differences (SMD) and 95% confidence interval (CI) were calculated using a random-effect model. As a result, 34 studies were included, encompassing 17 on RA, 12 on AS, 3 on PsA and 2 on both RA and AS. In these studies, PLT count was significantly higher in RA (SMD = 0.55, 95% CI = 0.36-0.73, < .001), AS (SMD = 0.53, 95% CI = 0.36-0.70, < .001) and PsA patients (SMD = 1.29, 95% CI = 0.82-1.77, < .001) than that in healthy subjects, while MPV and PDW presented nonsignificant differences in these intergroup comparisons ( > .05), and similar results were observed in subgroup analyses. The meta-regression analysis demonstrated that there were strong positive correlations between erythrocyte sedimentation rate and PLT count, and weak correlation trend between the disease activity score and PLT count in both RA and AS subjects without statistically significant difference. The sensitivity analysis indicated that these results were not unduly influenced by any single study. In conclusion, this meta-analysis demonstrated that PLT count was elevated in CIA patients and could be suitable for evaluating the disease activity, whereas MPV and PDW were independent of CIA.
Topics: Arthritis, Rheumatoid; Chronic Disease; Female; Humans; Male; Mean Platelet Volume; Platelet Count
PubMed: 31852367
DOI: 10.1080/09537104.2019.1704714 -
Bioscience Reports Dec 2018Recent years, the discussion about whether platelets participant in the development of sudden sensorineural hearing loss (SSHL) continues and many studies on the... (Meta-Analysis)
Meta-Analysis
Recent years, the discussion about whether platelets participant in the development of sudden sensorineural hearing loss (SSHL) continues and many studies on the relationship between them have come to our attention. Some studies believe that platelet parameters have significantly changed in patients with SSHL, while some not, controversially. Therefore, to investigate the association between platelet parameters, including mean platelet volume (MPV), platelet distribution width (PDW) and platelet count (PLT), and SSHL, expecting to resolve controversy and provide clinical evidence for diagnosis and monitoring of SSHL. Basic methods: Literature was retrieved searching electronic databases (PubMed, Embase, Cochrane, and Scopus) and searching references of related articles by hand. A total of 18 case-control studies involving 1837/1734 subjects (SSHL/control) were included. Meta-analysis showed there was no difference between the patients who suffered SSHL and healthy controls in MPV level [standard mean difference (SMD) (95% confidence interval (CI)) = 0.16 (-0.07, 0.40), = 80%, <0.00001] and PLT [SMD (95% CI) = -0.03(-0.18, 0.12), = 73%, <0.00001]. While PDW exhibited significant difference [SMD (95% CI) = 0.85 (0.20, 1.49), = 93%, <0.00001]. Subgroup analysis about geographical area suggested PLT have obvious evidence for SSHL in Eastern country [SMD (95% CI) = 0.23 (0.14, 0.33), = 0%, =0.81]. Our study did not support a correlation between MPV and SSHL, while PLT may have clinical significance for SSHL in Eastern country. With insufficient data to explore the resource of heterogeneity for PDW, there is no decisive conclusion reached.
Topics: Blood Platelets; Female; Hearing Loss, Sensorineural; Humans; Male; Mean Platelet Volume; Platelet Count
PubMed: 30232233
DOI: 10.1042/BSR20181183 -
Heliyon Mar 2024Vascular invasion (VI) indicates highly invasive tumor biological behavior and is a major determining factor of poor survival and high risk of metastasis in...
BACKGROUND
Vascular invasion (VI) indicates highly invasive tumor biological behavior and is a major determining factor of poor survival and high risk of metastasis in hepatocellular carcinoma (HCC). Epidemiological evidence of the association between pretherapeutic platelet count (PLT) and the risk of VI and extrahepatic metastasis in HCC remains controversial.
METHODS
A systematic retrieval was executed in databases of PubMed, Embase, and Web of Science until Dec 2022. Effect size and 95% confidence interval (CI) were extracted or estimated to synthetically investigate the effects of pretherapeutic PLT on VI and extrahepatic metastasis. Meta-analyses were performed by using a random or a fixed effects model.
RESULTS
Finally, the current meta-analysis included 15 studies with a total of 12,378 HCC patients. It was shown that, patients with a higher pretherapeutic level of PLT had a significantly increased risk of VI (11 studies,8,759 patients; OR = 1.44, 95%CI: 1.02-2.02) and extrahepatic metastasis (6 studies,8, 951 patients; OR = 2.51, 95% CI: 2.19-2.88) in comparison with patients with a lower PLT. Funnel plots and Begg's tests indicated that there were no significant publication biases.
CONCLUSION
This meta-analysis shows that pretherapeutic elevated PLT is associated with an increased risk of VI and extrahepatic metastasis in HCC.
PubMed: 38545227
DOI: 10.1016/j.heliyon.2024.e28173 -
Journal of Thrombosis and Haemostasis :... Jan 2010To determine whether an association exists between mean platelet volume (MPV) and acute myocardial infarction (AMI) and other cardiovascular events. Platelet activity is... (Meta-Analysis)
Meta-Analysis Review
AIM
To determine whether an association exists between mean platelet volume (MPV) and acute myocardial infarction (AMI) and other cardiovascular events. Platelet activity is a major culprit in atherothrombotic events. MPV, which is widely available in clinical practice, is a potentially useful biomarker of platelet activity in the setting of cardiovascular disease.
METHODS AND RESULTS
We performed a systematic review and meta-analysis investigating the association between MPV and AMI, all-cause mortality following myocardial infarction, and restenosis following coronary angioplasty. Results were pooled using random-effects modeling. Pooled results from 16 cross-sectional studies involving 2809 patients investigating the association of MPV and AMI indicated that MPV was significantly higher in those with AMI than those without AMI [mean difference 0.92 fL, 95% confidence interval (CI) 0.67-1.16, P < 0.001). In subgroup analyses, significant differences in MPV existed between subjects with AMI, subjects with stable coronary disease (P < 0.001), and stable controls (P < 0.001), but not vs. those with unstable angina (P = 0.24). Pooled results from three cohort studies involving 3184 patients evaluating the risk of death following AMI demonstrated that an elevated MPV increased the odds of death as compared with a normal MPV (11.5% vs. 7.1%, odds ratio 1.65, 95% CI 1.12-2.52, P = 0.012). Pooled results from five cohort studies involving 430 patients who underwent coronary angioplasty revealed that MPV was significantly higher in patients who developed restenosis than in those who did not develop restenosis (mean difference 0.98 fL, 95% CI 0.74-1.21, P < 0.001).
CONCLUSIONS
Elevated MPV is associated with AMI, mortality following myocardial infarction, and restenosis following coronary angioplasty. These data suggest that MPV is a potentially useful prognostic biomarker in patients with cardiovascular disease. Whether the relationship is causal, and whether MPV should influence practice or guide therapy, remains unknown.
Topics: Aged; Angioplasty, Balloon, Coronary; Blood Platelets; Cell Size; Coronary Artery Disease; Coronary Restenosis; Female; Humans; Linear Models; Male; Middle Aged; Myocardial Infarction; Odds Ratio; Platelet Count; Platelet Function Tests; Predictive Value of Tests; Prognosis; Risk Assessment; Risk Factors
PubMed: 19691485
DOI: 10.1111/j.1538-7836.2009.03584.x -
Journal of Clinical Neuroscience :... Jul 2022A potential relationship between poor clinical outcome and mean platelet volume (MPV), platelet distribution width (PDW) have been suggested by previous studies in acute... (Meta-Analysis)
Meta-Analysis Review
A potential relationship between poor clinical outcome and mean platelet volume (MPV), platelet distribution width (PDW) have been suggested by previous studies in acute ischemic stroke (AIS), but the conclusions continued to be controversial. Here, we performed meta-analysis of available studies to explore the effect of MPV, PDW on clinical outcomes in AIS. A systematic literature search was performed in PubMed, EMBASE, and Cochrane Library up to 21 Dec 2021. A total of 10 articles related to MPV and 4 articles related to PDW on the clinical outcome of AIS including 2,390 patients were enrolled in the meta-analysis. The overall result showed that MPV was decreased in favorable outcome group when compared with unfavorable outcome group [SMD (95%CI) = -0.52 (-0.80, -0.24)]. Subgroup analysis indicated that such trend was consistent in the retrospective study, prospective study, non-thrombolytic, EDTA anticoagulants, Sysmax hematology analyzers and detection time within 2 h. In the meta-analysis of PDW, the overall result and subgroup analyses of favorable outcome group did not observe the significant difference compared with unfavorable outcome group. In this meta-analysis, we found remarkable between-study heterogeneity, but Begg's test and Egger's test did not detect publication bias. In conclusion, this meta-analysis result suggested that elevated MPV may be a predictive marker of adverse clinical outcome of AIS, especially in non-thrombolytic patients, while PDW has insufficient value in predicting clinical outcome of AIS. SYSTEMATIC REVIEW REGISTRATION: This meta-analysis is registered on the International Prospective Register of Systematic Reviews (PROSPERO) under registration number CRD42022299316. https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=299316).
Topics: Blood Platelets; Humans; Ischemic Stroke; Mean Platelet Volume; Platelet Count; Prospective Studies; Retrospective Studies
PubMed: 35636058
DOI: 10.1016/j.jocn.2022.05.019 -
Journal of Obstetrics and Gynaecology :... Dec 2023To evaluate the value of the platelet-to-lymphocyte ratio (PLR) in predicting preeclampsia (PE) in pregnant women. (Meta-Analysis)
Meta-Analysis Review
BACKGROUND
To evaluate the value of the platelet-to-lymphocyte ratio (PLR) in predicting preeclampsia (PE) in pregnant women.
METHODS
PubMed, EMBASE and Web of Science databases were searched for observational studies (cohort, case-control or cross-sectional) that reported pre-treatment maternal PLR values in women with and without PE. The analysis was done using a random effects model. Pooled effect sizes were reported as weighted mean difference (WMD) with 95% confidence intervals (CIs). Newcastle-Ottawa Scale (NOS) was used to evaluate the risk of bias.
RESULTS
Twenty-five studies with 7755 patients were included in this meta-analysis. PLR was comparable in patients with PE and healthy pregnant women (WMD -2.97; 95% CI: -11.95 to 6.02; = 16). Patients with mild (WMD -3.00; 95% CI: -17.40 to 11.41; = 12) and severe PE (WMD -5.77; 95% CI: -25.48 to 13.94; = 14) had statistically similar PLR, compared to healthy controls.
CONCLUSIONS
Our findings show similar PLR in PE and healthy pregnancies. PLR, therefore, may not be used to differentiate between PE and normal pregnancy or for assessing the severity of PE. The majority of included studies were case-control, potentially introducing bias, and we identified evidence of publication bias as well.
Topics: Female; Humans; Pregnancy; Lymphocyte Count; Platelet Count; Pre-Eclampsia; Cross-Sectional Studies; Lymphocytes
PubMed: 38014649
DOI: 10.1080/01443615.2023.2286319 -
PloS One 2023Thrombocytopenia is defined as a decreased number of platelets in the circulating blood as a result of hypo-proliferation in marrow or peripheral destruction of... (Meta-Analysis)
Meta-Analysis
The diagnostic accuracy of mean platelet volume in differentiating immune thrombocytopenic purpura from hypo-productive thrombocytopenia: A systematic review and meta-analysis.
BACKGROUND
Thrombocytopenia is defined as a decreased number of platelets in the circulating blood as a result of hypo-proliferation in marrow or peripheral destruction of platelets. Several diagnostic methods have been proposed to discriminate the underline cause of thrombocytopenia. Recent studies showed that mean platelet volume (MPV) could be used for differential diagnosis of immune thrombocytopenic purpura (ITP). Thus, we aimed to investigate the diagnostic accuracy of MPV for differential diagnosis of ITP from hypo-productive thrombocytopenia.
METHODS
This study was conducted in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines (PRISMA). The study protocol was registered on PROSPERO with the reference number CRD42023447789. Relevant published studies that were published up to April 10, 2023, in peer-reviewed journals were searched on electronic different databases. The methodological quality of the included studies was appraised using the quality assessment of diagnostic accuracy studies 2 (QADAS-2) tool. The pooled weight mean difference (WMD) of MPV between the ITP group and hypo-productive group was analyzed using a random-effects model meta-analysis. Relevant data were extracted using a Microsoft Excel spreadsheet and analyzed using STATA 11.0 and Meta-disc 1.4 software. Publication bias was evaluated using Deek's funnel plot asymmetry test.
RESULTS
A total of 14 articles were included in this systematic review and meta-analysis. The comparison of MPV between groups revealed that the pooled mean value of MPV increased significantly in ITP patients compared to patients with hypo-productive thrombocytopenia (WMD = 2.03; 95% CI, 1.38-2.69). The pooled sensitivity and specificity of MPV in differentiating ITP from hypo-productive thrombocytopenia were 76.0% (95% CI: 71.0%, 80.0%) and 79.0% (95% CI: 75.0%, 83.0%), respectively. The summary positive likelihood ratio (PLR) and negative likelihood ratio (NLR)using the random effects model were 3.89 (95% CI: 2.49, 6.10) and 0.29 (95% CI: 0.18, 0.46), respectively.
CONCLUSION
MPV can be used to discriminate ITP from hypo-productive thrombocytopenia. It can possess large advantages as it is noninvasive, simple, quick, inexpensive, easy to perform, reliable, and routinely generated by automated cell counters.
Topics: Humans; Purpura, Thrombocytopenic, Idiopathic; Mean Platelet Volume; Platelet Count; Thrombocytopenia; Blood Platelets
PubMed: 38033118
DOI: 10.1371/journal.pone.0295011