Table 2. Follow-up at yearly intervals.

Follow-up(month)	Observation Group		Surgery Group
	No. of Cases	%	No. of Cases	%
12	30	100.0	92	100.0
24	28	93.3	85	92.4
36	24	80.0	72	78.2
48	20	66.7	61	66.3
60	15	50.0	45	48.9
72	8	26.7	33	35.9
96	2	6.6	8	8.7
108	1	3.3	1	1.1