The effects of metformin (a) and various doses of hot-water (b), cold-water (c), and alcoholic (d) Artemisia annua extracts on homeostasis model assessment of insulin resistance (HOMA-IR) in high-fat diet/streptozotocin-induced diabetic mice. Data are expressed as the mean±SEM. (n=5). aaaaP<0.0001 versus the T2D group. ccccP<0.0001 versus the CON group. bbP<0.01 and bbbP<0.001 versus the T2D+MTF group. *P<0.05, **P<0.01 and ***P<0.001 show significant differences among different doses of the same type of extract. Groups: Control (CON), Type 2 diabetes (T2D), T2D+Metformin (T2D+MTF), T2D+hot-water extract (T2D+HWE), T2D+cold-water extract (T2D+CWE) and T2D+alcoholic extract (T2D+ALE)