Table 4 Pearson’s correlation coefficients of phytochemicals in E. H with different antioxidant and antidiabetic parameters

 TPC

1

0.993**

0.953**

−0.989**

−0.999**

−0.848**

 TFC

–

1

0.972**

0.982**

−0.9995**

− 0.997**

− 0.904**

 FRAP

0.993**

0.972**

1

–

–

−0.98**

− 0.778**

 TEAC

0.953**

0.982**

–

1

–

−0.992**

−0.969**

 IC₅₀ value of DPPH

−0.989**

−0.9995**

–

–

1

0.996**

0.917**

 IC₅₀ value of α-amylase inhibitory activity

−0.999**

−0.997**

− 0.98**

−0.992

0.996**

1

–

 IC₅₀ value of α-glucosidase inhibitory activity

−0.848**

−0.904**

− 0.778**

−0.969**

0.917**

–

1