Fig. 1

a IRI(5) significantly increased by 8.8 ± 11.4 μU/mL (P = 0.038); IRI(0) and IRI(15) did not change significantly. b Endogenous insulin secretory function had a strong relationship with 5′ ΔIRI, which significantly increased by 6.43 ± 6.72 U/mL (P = 0.014)