Table 2.

Optical density of TGF-β₁ in kidney x̅ ± s

Groups	n	TGF-β1 (OD)
Control	10	0.159 ± 0.0520
Model	15	0.274 ± 0.0615**
Metformin	15	0.225 ± 0.0561**,^
Prescription	15	0.178 ± 0.0488^^,▽

^** P < 0.01 vs. Control rats;

^{^} P < 0.05 vs. Model;

^{^^} P < 0.01 vs. Model;

^▽ P < 0.05 vs. Metformin rats.