Parameters	Age (years)	Mean	Age (years) a
			< 50	50-60	> 60
Severity Levels by Oxford Knee Score	< 50	40.44
	50-60	32.00	8.44**
	> 60	31.27	9.17**	0.73
Quality of life In Mental Health	< 50	22.33
	50-60	23.62	-1.29*
	> 60	23.70	-1.37*	-0.08