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. 2011 May;7(3):172–177. doi: 10.1200/JOP.2010.000158

Table 3.

Factors Influencing Decision to Participate in Clinical Trials

Factor Not Influential at All
Not Very Influential
Moderately Influential
Strongly Influential
Extremely Influential
No. % No. % No. % No. % No. %
My oncologist discouraged it 30 15.5 11 5.6 37 19.1 49 25.3 67 34.5
My oncologist did not discuss it with me 37 19.1 48 24.8 48 24.8 32 16.5 29 14.9
My family doctor discouraged it 28 16.3 15 8.7 44 25.6 49 28.5 36 20.9
My family doctor did not discuss it with me 52 30.4 34 19.9 48 28.1 19 11.1 18 10.5
Family/friends discouraged it 55 30.9 43 24.2 45 25.3 22 12.4 13 7.3
Other health problems 25 14.5 9 5.2 64 37.2 43 25.0 31 18.0
I am afraid the therapy will not work or there will be side effects 28 16.2 25 14.5 67 38.7 34 19.7 19 11.0
I don't feel there is enough benefit for me 35 20.7 33 19.5 50 29.6 35 20.7 16 9.5
I had past involvement in a clinical trial with bad outcome 58 43.6 12 9.0 21 15.8 25 18.8 17 12.8
I was previously denied participation in a clinical trial 72 56.7 21 16.5 15 11.8 9 7.1 10 7.9
I live far away from the clinic/hospital 46 29.1 23 14.5 33 20.9 30 19.0 26 16.5
Additional test costs and fee/not insured 27 16.8 15 9.3 33 20.5 42 26.1 44 27.3
I don't know enough about clinical trials 49 27.7 24 13.6 42 23.7 31 17.5 31 17.5

NOTE. Some respondents did not rate all of the above factors. Percentages were calculated on the basis of the total number of responses received.