Table 2b.

Tukey post hoc test of change in volume of groups one year post surgery

	Mean Difference	P
Group 2 vs Group 1	62.68	0.874
Group 3 vs Group 1	318.93*	0.007*
Group 4 vs Group 1	58.25	0.896
Group 3 vs Group 2	256.25*	0.033*
Group 2 vs Group 4	4.43	1.000
Group 3 vs Group 4	260.68*	0.030*

*Significant; P<0.05 is considered significant