Predictive value of NLR and PLR in missed miscarriage

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Abstract
Background: The aim of the study was to investigate the predictive value of neutrophil to lymphocyte ratio (NLR) and platelet to lymphocyte ratio (PLR) in missed miscarriage.Methods: In this retrospective cohort study, a total of 400 women (involving 200 with missed early miscarriage and 200 with normal pregnancy but terminate by artificial abortion) were included. General clinical data and complete blood count (CBC) such as white blood cells (WBC), red blood cells (RBC), platelet (PLT), red blood cell distribution width‐standard deviation (RDW‐SD), platelet distribution width (PDW), mean platelet volume (MPV), neutrophil count, and lymphocyte count were collected, and the NLR and PLR were calculated for both groups. Receiver operating characteristic curve (ROC) was used to calculate the predictive value.Results: There was no significant difference in the WBC, RBC, PLT, RDW‐SD, PDW, neutrophil, lymphocyte, NLR, and PLR between the two groups (p > 0.05).But MPV was lower in the missed early miscarriage group than in the control group (p < 0.05), and the area under the working curve (AUC) of ROC was 0.58, specificity and sensitivity was 69% and 47%, respectively.Conclusion: NLR and PLR were not the suitable indictor for missed miscarriage, but MPV should be a concern in the first trimester.

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