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  • Title: Stroop Test Validation to Screen for Minimal Hepatic Encephalopathy in Pediatric Extrahepatic Portal Venous Obstruction.
    Author: Suresh MV, Jagadisan B, Kandasamy P, Senthilkumar GP.
    Journal: J Pediatr Gastroenterol Nutr; 2018 May; 66(5):802-807. PubMed ID: 29373442.
    Abstract:
    OBJECTIVES: Minimal hepatic encephalopathy (MHE) has been reported in children with extrahepatic portal vein obstruction (EHPVO). MHE assessment is restricted to research situations as neuropsychiatric tests are time-intensive. Computerized Stroop Test (CST) has been used in cirrhotic adults for MHE screening. The study aims to assess MHE frequency in young Indian children with EHPVO and validate CST for MHE screening in pediatric EHPVO. METHODS: Thirty-seven children with EHPVO between 7 and 12 years of age and 37 age- and sex-matched controls were enrolled. Fasting plasma ammonia was measured. MHE was diagnosed by Revised Amsterdamse Kinder Intelligentie Test. The performance of a Tamil language version of CST in MHE screening was assessed. RESULTS: MHE was diagnosed in 18.9% (7/37) of EHPVO (EHPVO-MHE). Plasma ammonia levels were higher in EHPVO-MHE compared to EHPVO without MHE (EHPVO-No-MHE) but abnormal plasma ammonia levels are unsuitable for MHE screening. CST was administered in 35 EHPVO and 37 controls. EHPVO-MHE, compared to EHPVO-No-MHE, had longer "on time," "off time," "(on+off) time," and "(on-off) time." For MHE diagnosis, specificity and sensitivity of "(on+off) time" were 100% and 89.6% for a cutoff of >180.4 seconds (area under receiver operating characteristic = 0.97). CONCLUSIONS: In the absence of other risk factors for neurological insult or patent surgical shunts, MHE frequency in young Indian children with EHPVO, determined by Revised Amsterdamse Kinder Intelligentie Test, was lesser than in earlier studies. CST is suitable for MHE screening in clinical practice to select patients for neuropsychiatric evaluation.
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