Publication: Evaluating the performance of automated UV enzymatic assay for screening of glucose 6-phosphate dehydrogenase deficiency
Issued Date
2019-04-01
Resource Type
ISSN
1751553X
17515521
17515521
Other identifier(s)
2-s2.0-85055936299
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Laboratory Hematology. Vol.41, No.2 (2019), 192-199
Suggested Citation
Pornchai Anantasomboon, Makamas Chanda, Watcharapong Jugnam-ang, Pirada Witoonpanich, Poonlarp Cheepsunthorn, Issarang Nuchprayoon, Suthat Fucharoen, Chalisa L. Cheepsunthorn Evaluating the performance of automated UV enzymatic assay for screening of glucose 6-phosphate dehydrogenase deficiency. International Journal of Laboratory Hematology. Vol.41, No.2 (2019), 192-199. doi:10.1111/ijlh.12943 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/50212
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Title
Evaluating the performance of automated UV enzymatic assay for screening of glucose 6-phosphate dehydrogenase deficiency
Abstract
© 2018 John Wiley & Sons Ltd Introduction: A precise and reliable screening assay for glucose 6-phosphate dehydrogenase (G6PD) deficiency would greatly help avoiding unwanted outcomes due to bilirubin neurotoxicity in neonatal jaundice and antimalarial-induced haemolytic anaemia in malaria patients. Currently, available assays are laborious and require sophisticated laboratory expertise. This study aimed to evaluate the performance of a recently introduced automated screening assay for G6PD deficiency by comparing with a routine spectrophotometric assay. Methods: An automated UV-based enzymatic (Mindray, PRC) and spectrophotometric assays were performed simultaneously in parallel to determine G6PD activity in 251 blood samples from the subjects. Results: The median G6PD activity value from spectrophotometric assay was significantly lower than that of from the automated assay. The mean difference was −2.0 U/g haemoglobin (−7.3 to 3.2; P < 0.0001). The mean activity values of both assays were strongly correlated with Pearson's correlation coefficient of r = 0.8. Cohen's kappa statistics between assays was 0.77 (0.70-0.83). The sensitivity, specificity, positive and negative predictive values of the automated assay were 85.7%, 99.2%, 85.7%, 99.2%, respectively. The sensitivity and positive predictive values of the automated assay for identifying intermediate G6PD activity levels were 40.0% and 25.0%, respectively. Genotyping was performed to confirm G6PD deficient and intermediate samples. The turnaround time for 40 samples was 60 minutes for the automated assay and 300 minutes for spectrophotometric assay. Conclusion: The automated assay for the detection of G6PD deficiency is comparable to a routine spectrophotometric assay and help reducing sample handling time. However, the assay shows limitation in identifying individuals with G6PD intermediate.