Table 1b.

Tukey post hoc test of 1 year Post Surgery Volume between groups

	Mean Difference	P
Group 1 vs Group 2	71.88	0.971
Group 3 vs Group 1	213.77	0.576
Group 1 vs Group 4	22.58	0.999
Group 3 vs Group 2	285.65	0.338
Group 4 vs Group 2	49.30	0.990
Group 3 vs Group 4	236.35	0.496

P<0.05 is considered significant