Table 4.

Comparison of the microstructural changes in the trigeminal structures between the two groups before the operations and at one year after the operations (x̅±s)

group	point of time	FA values	ADC (×10-9 mm2/s)
Endoscopy Group (45)	Preoperative	0.34±0.08	2.02±0.25
	1 year after surgery	0.39±0.02	1.67±0.17
ta		4.067	7.766
Pa		<0.001	<0.001
Microscopy group (42)	Preoperative	0.33±0.09	1.97±0.26
	1 year after surgery	0.37±0.05	1.82±0.27
ta		2.518	2.593
Pa		0.014	0.011
tb		0.549	0.914
Pb		0.585	0.363
tc		2.480	3.123
Pc		0.015	0.002