| Important (%) | Not important (%) | Not relevant (%) | |
| For the advancement of research, of medicine | 249 (89) | 24 (9) | 6 (2) |
| To benefit others | 222 (80) | 45 (16) | 12 (4) |
| To benefit from the best treatment* | 193 (69) | 44 (16) | 42 (15) |
| Because I trust my physician | 161 (58) | 74 (26) | 44 (16) |
| To benefit from more comprehensive care | 149 (53) | 81 (29) | 49 (18) |
| Because the treatment is not available otherwise | 98 (35) | 74 (27) | 107 (38) |
| Because there is no choice | 67 (24) | 67 (24) | 145 (52) |
| Because it is interesting, out of curiosity | 60 (21) | 142 (51) | 77 (28) |
| Because I know other persons who did it | 12 (4) | 24 (9) | 243 (87) |
N indicates the number of respondents
*All patients answered this item, even if they were not included in a therapeutic protocol. This was because a diagnostic protocol could also be expected to result in a more appropriate treatment choice. Of the 162 patients in a therapeutic protocol, 131 answered “very important” and 16 “not important”.
The table lists responses to the following: “I will read a series of statements that may represent reasons to participate to a research protocol. I would like you to tell me whether, for you, these reasons were important, not important or not relevant.”