Outcomes and risk factors of patients with acute fatty liver of pregnancy: a multicentre retrospective study

INTRODUCTION Acute fatty liver of pregnancy (AFLP) frequently causes liver failure in pregnant women. A better understanding of the clinical characteristics, management, outcomes and risk factors of AFLP is required, given its relatively high mortality rate. We aimed to describe the characteristics of AFLP, and further assess its outcomes and potential risk factors from the perspectives of the mother and fetus. METHODS This was a retrospective cohort study of 133 patients with AFLP hospitalised at four tertiary hospitals in China between January 2009 and April 2014. RESULTS Among 133 patients, AFLP was diagnosed in the postpartum period for 13 (9.8%) patients. Potential factors influencing adverse maternal outcome were male fetus (p = 0.04), postpartum diagnosis of AFLP (p < 0.01), intrauterine fetal death (p = 0.04), disseminated intravascular coagulation (p < 0.01), prothrombin time (p < 0.01) and activated partial thromboplastin time (p = 0.04). The frequency of fetal distress (p = 0.03) and activated partial thromboplastin time (p < 0.05) were significantly higher in pregnancies with dead fetuses than in those where the fetuses survived. Independent risk factors for perinatal maternal mortality were history of legal termination of pregnancy (odds ratio [ OR] 1.958, 95% confidence interval [CI] 1.133-3.385), total bilirubin (OR 1.009, 95% CI 1.003-1.014) and serum creatinine (OR 1.010, 95% CI 1.003-1.017). CONCLUSION Compared with total bilirubin and serum creatinine, history of legal termination of pregnancy appeared to be a greater risk factor for maternal mortality among patients with AFLP.