Red cell distribution width to platelet ratio, a useful indicator of liver fibrosis in chronic hepatitis patients
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We investigated the correlation between the red cell distribution width (RDW) and RDW-to-platelet ratio (RPR) with the degree of inflammation and fibrosis in chronic hepatitis patients with different etiologies and in native and transplanted liver.
Between 2010 and 2013, patients from the MedStar Washington Hospital Center and Georgetown University Hospital with chronic hepatitis B, chronic hepatitis C, alcoholic hepatitis, and primary biliary cirrhosis who had a biopsy of the liver done in this time period were included. The correlation among the RDW, RPR, and model for end-stage liver disease (MELD) score with the degree of liver inflammation, fibrosis, and cirrhosis in separate groups of native and transplanted liver was calculated.
A total of 152 cases with native liver and 70 cases with transplanted liver were included. The majority of patients had hepatitis C in both groups. None of the investigated variables showed significant correlation with the degree of inflammation in either group. The strongest correlation with the degree of fibrosis in the native liver group was for the RPR with 0.51 (p < 0.001) and then the RDW and MELD with 0.34 (p < 0.001) and 0.31 (p < 0.001), respectively. In the transplanted liver group, none of the variables showed significant correlation with the degree of fibrosis. The receiver-operator curve showed that only the RDW and RPR in the native liver group, with areas under the curve of 0.770 and 0.684, respectively, have significantly positive association with the risk of cirrhosis. In the transplanted group, none of the predictors were associated with risk of cirrhosis. In the native liver group, a cutoff value of 0.088 in the RPR led to 82.7 % sensitivity and 61.0 % specificity to predict cirrhosis.
The RPR can be a strong predictor of the degree of fibrosis and cirrhosis in patients with chronic hepatitis and native liver. It shows higher accuracy compared to the RDW and MELD score. However, its use in predicting inflammation is limited.
KeywordsRDW-to-platelet ratio Liver fibrosis Cirrhosis
This project was funded in part by federal funds (grant no. UL1TR000101, previously UL1RR031975) from the National Center for Advancing Translational Sciences (NCATS), National Institutes of Health (NIH), through the Clinical and Translational Science Awards Program (CTSA), a trademark of DHHS, part of the Roadmap Initiative, “Re-Engineering the Clinical Research Enterprise.”
Compliance with Ethical Requirements and Conflict of interest
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008 (5). This study was reviewed and approved by the Institutional Review Board of MesdStar Health Research Institute. Amir Taefi, Chun-Chih Huang, Kirthi Kolli, Suzan Ebrahimi, and Mitesh Patel declare that they have no conflict of interests.
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