Abstract:
AIM:To determine if liver stiffness (LS) measurements by means of transient elastography (TE) correlate with the presence of significant esophageal varices (EV) and if they can predict the occurrence of variceal bleeding. METHODS:We studied 1000 cases of liver cirrhosis divided into 2 groups: patients without EV or with grade 1 varices (647 cases) and patients with significant varices (grade 2 and 3 EV) (353 cases). We divided the group of 540 cases with EV into another 2 subgroups: without variceal hemorrhage (375 patients) and patients with a history of variceal bleeding (165 cases). We compared the LS values between the groups using the unpaired t-test and we established cut-off LS values for the presence of significant EV and for the risk of bleeding by using the ROC curve. RESULTS:The mean LS values in the 647 patients without or with grade 1 EV was statistically significantly lower than in the 353 patients with significant EV (26.29 ± 0.60 kPa vs 45.21 ± 1.07 kPa, P < 0.0001). Using the ROC curve we established a cut-off value of 31 kPa for the presence of EV, with 83% sensitivity (95% CI: 79.73%-85.93%) and 62% specificity (95% CI: 57.15%-66.81%), with 76.2% positive predictive value (PPV) (95% CI: 72.72%-79.43%) and 71.3% negative predictive value (NPV) (95% CI: 66.37%-76.05%) (AUROC 0.7807, P < 0.0001). The mean LS values in the group with a history of variceal bleeding (165 patients) was statistically significantly higher than in the group with no bleeding history (375 patients): 51.92 ± 1.56 kPa vs 35.20 ± 0.91 kPa, P < 0.0001). For a cut-off value of 50.7 kPa, LS had 53.33% sensitivity (95% CI: 45.42%-61.13%) and 82.67% specificity (95% CI: 78.45%-86.36%), with 82.71% PPV (95% CI: 78.5%-86.4%) and 53.66% NPV (95% CI: 45.72%-61.47%) (AUROC 0.7300, P < 0.0001) for the prediction of esophageal bleeding. CONCLUSION:LS measurement by means of TE is a reliable noninvasive method for the detection of EV and for the prediction of variceal bleeding.
journal_name
World J Gastroenteroljournal_title
World journal of gastroenterologyauthors
Sporea I,Raţiu I,Sirli R,Popescu A,Bota Sdoi
10.3748/wjg.v17.i17.2206subject
Has Abstractpub_date
2011-05-07 00:00:00pages
2206-10issue
17eissn
1007-9327issn
2219-2840journal_volume
17pub_type
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journal_title:World journal of gastroenterology
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