First-trimester aspartate aminotransferase to platelet ratio index in predicting intrahepatic cholestasis in pregnancy and its relationship with bile acids: A pilot study

Abstract

Objective

To evaluate the predictive value of the first-trimester aspartate aminotransferase (AST)/platelet count ratio [AST to platelet ratio index (APRI) score] for intrahepatic cholestasis in pregnancy (ICP).

Methods

This study consisted of a patient group diagnosed with ICP (n = 37) and a control group (n = 66) who presented to the hospital perinatology clinic between 2018 and 2020. Laboratory tests of both groups were analysed retrospectively. Age, gravida, parity, body mass index, third-trimester laboratory tests and first-trimester APRI scores were compared between the two groups. A receiver operating characteristic (ROC) analysis of the study was performed to determine the cut-off value for APRI score that is predictive of ICP.

Results

Patients with ICP had significantly higher first-trimester APRI scores compared with controls (p < 0.001). In the ROC analysis, the cut-off value for APRI score was 0.57, with 86.5 % sensitivity and 77.3 % specificity. Spearman's correlation indicated that there was a significant positive association between first-trimester APRI score and third-trimester fasting bile acid level (r = 0.641, p < 0.001). The demographic characteristics of patients in the third trimester did not differ, except for AST and alanine transferase values.

Conclusions

The APRI score calculated in the first trimester of pregnancy seems to be predictive of the development of ICP in the third trimester.