Table 5: Analysis of the MCS component of SF12 using the paired sample T Test.

When Compared to Preoperative MCS	Paired Differences		Sig. (2 – tailed)
	Mean Differences	Std. Deviation
at 6 months	5.05000	12.34412	0.123
at 12 months	-4.87143	9.72818	0.084
at 24 months	-3.69444	10.52736	0.155
at 36 months	2.83875	8.98794	0.226
at 60 months	-10.65000	7.19407	0.000*