Table 6.

t test

	t test for equality of means
	t	df	P value
Independent samples test
Hounsfield units preoperative	− 1.963	48	0.055
Hounsfield units post-operative 6 months	2.848	48	0.006**
Hounsfield units post-operative 12 months	2.691	48	0.010**

**P ≤ 0.01 but > 0.001