G6PD and G6PD deficiency: On the other hand, the sensitivity of the CareStartTM G6PD RDT ranged from 81.3 % (95 % CI 68–90 %) to 97.4 % (95 % CI 78–100 %) for detecting G6PD deficiency at the cut-offs of ≤60 and ≤30 %, respectively, compared to the reference method, with comparable specificity levels of 96.4–96.9 %.