Preliminary development of a questionnaire measuring patient views of participation in clinical trials

BMC Research Notes

Table 1 Loadings of variables on factors (italic print) emerging from rotated component matrix

Item no.	Abbreviated item label	Factors						Communalities
Item no.	Abbreviated item label	1	2	3	4	5	6	Communalities
14	Receive clear information			0.66				0.46
15	Can ask questions			0.91				0.88
16	Express views	0.82						0.76
17	Involved in discussions	0.94						0.90
18	Involved in decisions	0.63						0.51
19	Responsibility for health			0.43				0.37
20	Type of treatment	0.64						0.46
21	Purpose of treatment	0.54						0.54
22	Side effects		0.84					0.74
23	Risks		0.73	0.52				0.91
24	Benefits		0.60		0.64			0.78
25	Cost-free treatment	0.77						0.63
26	Pain/discomfort	0.64	0.68					0.88
27	Quality of life				0.83			0.70
28	Part of medical research	0.58						0.64
29	Research team members			0.47		0.42		0.58
30	Understanding trial aim	0.65						0.68
31	Understanding—help you now			0.84				0.74
32	Understanding—help others now	0.70					0.45	0.80
33	Understanding—help you in future						0.78	0.65
34	Understanding—help others in future						0.88	0.80
35	Compensation					0.75		0.66
36	Out of pocket costs		0.74			0.52		0.84
37	Convenient					0.68		0.57
38	Travel		0.57			0.59		0.72
39	Need help in participation					0.55		0.52
40	Confidential				0.80			0.66
41	Withdraw							0.22
42	Ethically approved	0.64						0.48
43	Person to contact during trial		0.75					0.60

Communalities are estimates of the variance accounted for by each variable in the factor solution

ISSN: 1756-0500