Table 1. Results of the immunohistochemical analysis for STAT3, HIF-1α and VEGF (‾MD×10³).

Group	Number	STAT3	HIF-1α	VEGF
pterygium	50	6.99±4.53***	7.13±6.08***	7.06±4.84***
progressive pterygium	38	7.90±4.76**	8.12±6.62**	7.88±5.24**
stationary pterygium	12	4.11±1.71	3.98±1.84	4.47±1.63
normal conjunctiva	20	2.60±1.54	1.88±1.09	2.08±0.93