Table 2.

Compliance with QOL assessment

	PC group (n = 34)				VGD group (n = 34)
Assessment time	Baseline	6 week	12 week	18 week	Baseline	6 week	12 week	18 week
No. of evaluable patients	34	34	23	13	34	34	24	20
Discontinuation of protocol treatment	0	0	11	10	0	0	10	4
Investigator's error	0	1	1	1	0	1	0	1
No reason provided	0	0	0	0	0	0	1	1
No. of submitted questionnaires Compliance (%)	34 100%	33 97%	22 96%	12 92%	34 100%	33 97%	23 96%	18 90%