Table 2. QL data collected.

	High dose			Conventional			All
Time point	Expected	Returned	%	Expected	Returned	%	Expected	Returned	%
Baseline	198	155	78	192	147	77	390	302	77
6 months	194	144	74	185	141	76	379	285	75
1 year	180	136	76	174	124	71	354	260	74
2 years	145	97	68	144	107	74	289	204	71
3 years	124	65	52	128	73	58	252	138	55
4 years	109	57	52	118	64	54	227	121	53
5 years	105	45	44	112	56	52	217	101	50