APRI score > 2 is 89% specific in detecting cirrhosis (F4). With a sensitivity of 35%, an APRI value > 2 can miss two thirds with cirrhosis. APRI score > 1 is more sensitive (65%) but is less specific (75%) in detecting cirrhosis. APRI score > 1.5 is 92% specific but can miss almost two thirds with significant hepatic fibrosis (F2-F4).
(Guidelines for the prevention, care and treatment of persons with chronic hepatitis B infection. 2015, WHO)