|
Influencing factors
|
|
What the research study involves (e.g., survey, drug testing for research)c
|
71
|
8
|
111
|
65
|
–
|
–
|
|
How much time is required
|
65
|
14
|
102
|
74
|
1.42*
|
(1.21, 1.67)
|
|
How often they have to come in for visits
|
69
|
10
|
72
|
104
|
2.14*
|
(1.75, 2.60)
|
|
How far they have to travel to participate (i.e., nearby vs. out of town)c
|
70
|
9
|
92
|
84
|
–
|
–
|
|
Privacy of the research office
|
65
|
14
|
110
|
66
|
1.32*
|
(1.13, 1.53)
|
|
Why their information is being collected and what it will be used for
|
65
|
14
|
99
|
77
|
1.46*
|
(1.24, 1.73)
|
|
Whether their information will be kept confidentialc
|
72
|
7
|
118
|
58
|
–
|
–
|
|
Whether the staff doing the research is friendly and trustworthyc
|
76
|
3
|
114
|
62
|
–
|
–
|
|
Whether the research institution or university is respected
|
44
|
35
|
78
|
98
|
1.26
|
(0.97, 1.63)
|
|
Whether they can skip questions of parts of the study that make them uncomfortable
|
60
|
19
|
88
|
88
|
1.52*
|
(1.25, 1.84)
|
|
How much money they will receivec
|
70
|
9
|
113
|
63
|
–
|
–
|
|
How much the project will benefit them overallc
|
70
|
9
|
88
|
88
|
–
|
–
|
|
Whether their appointment times will interfere with their work schedule
|
46
|
33
|
63
|
113
|
1.63*
|
(1.24, 2.14)
|
|
Whether they have childcare so that they can attend their appointments
|
51
|
28
|
74
|
102
|
1.54*
|
(1.21, 1.95)
|
|
How their friends, family, or partner feels about them participating
|
49
|
30
|
64
|
112
|
1.71*
|
(1.31, 2.21)
|
|
Motivations
|
|
Financial incentive (i.e., money or gift card given for participationc
|
79
|
0
|
134
|
42
|
–
|
–
|
|
They believe in the mission of the research and want to contribute
|
61
|
18
|
96
|
80
|
1.42*
|
(1.18, 1.70)
|
|
Their friends, family, or partner participates
|
65
|
14
|
97
|
79
|
1.49*
|
(1.26, 1.77)
|
|
They want to tell their story
|
53
|
26
|
86
|
90
|
1.37*
|
(1.11, 1.70)
|
|
They know someone on the research team and want to help them out
|
40
|
39
|
42
|
134
|
2.12*
|
(1.51, 2.99)
|
|
They want to learn about the topic
|
51
|
28
|
79
|
97
|
1.44*
|
(1.14, 1.81)
|
|
They would want to get free testing (for example, rapid tests for HIV & Hepatitis C) if it was offered as part of the studyc
|
71
|
8
|
102
|
74
|
–
|
–
|
|
They would want to be linked with resources and/or follow-up testing if it was offered as part of the study
|
69
|
10
|
103
|
73
|
1.49*
|
(1.28, 1.73)
|
|
They would want to try a new treatment if it was offered as part of the study
|
68
|
11
|
105
|
71
|
1.44*
|
(1.24, 1.68)
|
|
Their friends, family, or partner pressures them to participate so that they can share the financial incentive
|
42
|
37
|
43
|
133
|
2.18*
|
(1.56, 3.03)
|
|
Barriers
|
|
Not being able to get in touch with participants because their contact information changedc
|
74
|
5
|
133
|
43
|
–
|
–
|
|
Not being able to get in touch with participants because they gave false contact information when they started the study
|
46
|
33
|
100
|
76
|
1.02
|
(0.82, 1.29)
|
|
They may have trouble getting transportation for their appointments
|
64
|
15
|
124
|
52
|
1.15
|
(0.99, 1.33)
|
|
They may have trouble being able to show up at a specific appointment timec
|
72
|
7
|
108
|
68
|
–
|
–
|
|
They may have trouble getting to their appointment because of their work schedule
|
51
|
28
|
71
|
105
|
1.60*
|
(1.26, 2.04)
|
|
They may have trouble finding childcare so that they can go to their appointment
|
53
|
26
|
74
|
102
|
1.60*
|
(1.26, 2.01)
|
|
They may have concerns about confidentiality and privacy
|
54
|
25
|
79
|
97
|
1.52*
|
(1.22, 1.90)
|
|
They may be afraid that the staff would judge them if they are still using drugs
|
41
|
38
|
76
|
100
|
1.20
|
(0.92, 1.58)
|
|
They may have stopped using drugs and no longer think the study is relevant to them
|
47
|
32
|
74
|
102
|
1.42*
|
(1.10, 1.82)
|
|
They are in a drug treatment or recovery facility and are unable to be contacted by research staff
|
55
|
24
|
92
|
84
|
1.33*
|
(1.09, 1.63)
|
|
Their friends, family, or partner may want them to stop participating
|
28
|
51
|
49
|
127
|
1.27
|
(0.87, 1.86)
|
