PKM and G6PD deficiency: In univariate analyses, factors such as GA (≤38 and 6/7 weeks vs. 39 and 0/7 weeks), the presence of glucose-6-phosphate dehydrogenase deficiency, and levels of TcB—within 24 h and between 24 and 48 h postpartum—were associated with an increased probability of undergoing phototherapy (p < 0.05).