OBJECTIVE: A longitudinal cohort study was conducted in Bangkok, Thailand between 2008 and 2013 in order to determine the practice effect of serial neuropsychological testing and establish normative data among normal (HIV-uninfected) Thai volunteers. MATERIAL AND METHOD: The authors enrolled 511 cognitively healthy individuals (HIV-uninfected, no drug abuse or other previous/current neurological or psychological conditions) to assess baseline performance on a HIV-specific neuropsychological testing battery. Ninety-nine subjects were re-assessed at 6 and 12 months to evaluate practice effects. RESULTS: The mean age of the 99 subjects completing longitudinal visits was 49.2 years and 53 were male. The authors identified improved mean raw scores on most neuropsychological tests with repeated measurements; however only change in WHO Auditory Verbal Learning Test (AVLT) scores (learning, attention, immediate and delayed recall tasks) met statistical significance, with larger differences seen between baseline and 6-month compared to 6 and 12 months follow-up. Older age correlated with poorer baseline raw score, and was a predictor of worse performance at 6 months and 12 months on several tasks. Level of education was associated with practice effects on several tests. No similar effects were observed with gender. CONCLUSION: The authors identified improved performance after repeated measurements revealing a significant practice effect on an HIV-specific neuropsychological testing battery employed in Bangkok, Thailand. Main predictors were age and educational attainment.
OBJECTIVE: A longitudinal cohort study was conducted in Bangkok, Thailand between 2008 and 2013 in order to determine the practice effect of serial neuropsychological testing and establish normative data among normal (HIV-uninfected) Thai volunteers. MATERIAL AND METHOD: The authors enrolled 511 cognitively healthy individuals (HIV-uninfected, no drug abuse or other previous/current neurological or psychological conditions) to assess baseline performance on a HIV-specific neuropsychological testing battery. Ninety-nine subjects were re-assessed at 6 and 12 months to evaluate practice effects. RESULTS: The mean age of the 99 subjects completing longitudinal visits was 49.2 years and 53 were male. The authors identified improved mean raw scores on most neuropsychological tests with repeated measurements; however only change in WHO Auditory Verbal Learning Test (AVLT) scores (learning, attention, immediate and delayed recall tasks) met statistical significance, with larger differences seen between baseline and 6-month compared to 6 and 12 months follow-up. Older age correlated with poorer baseline raw score, and was a predictor of worse performance at 6 months and 12 months on several tasks. Level of education was associated with practice effects on several tests. No similar effects were observed with gender. CONCLUSION: The authors identified improved performance after repeated measurements revealing a significant practice effect on an HIV-specific neuropsychological testing battery employed in Bangkok, Thailand. Main predictors were age and educational attainment.
Authors: Steven Paul Woods; Meredith Childers; Ronald J Ellis; Stephanie Guaman; Igor Grant; Robert K Heaton Journal: Arch Clin Neuropsychol Date: 2005-09-19 Impact factor: 2.813
Authors: M Maj; P Satz; R Janssen; M Zaudig; F Starace; L D'Elia; B Sughondhabirom; M Mussa; D Naber; D Ndetei Journal: Arch Gen Psychiatry Date: 1994-01
Authors: Payal B Patel; Andrew Belden; Ryan Handoko; Thanyawee Puthanakit; Stephen Kerr; Pope Kosalaraksa; Pradthana Ounchanum; Suparat Kanjanavanit; Linda Aurpibul; Chaiwat Ngampiyasakul; Wicharn Luesomboon; Claude A Mellins; Kathleen Malee; Jintanat Ananworanich; Robert Paul Journal: Glob Ment Health (Camb) Date: 2021-02-09
Authors: Tanya C Do; Stephen J Kerr; Anchalee Avihingsanon; Saowaluk Suksawek; Supalak Klungkang; Taweesak Channgam; Christoph C Odermatt; Wirach Maek-A-Nantawat; Kiat Ruxtungtham; Jintanat Ananworanich; Victor Valcour; Peter Reiss; Ferdinand W Wit Journal: J Virus Erad Date: 2018-01-01