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. Author manuscript; available in PMC: 2023 Jun 1.
Published in final edited form as: J Natl Med Assoc. 2022 Mar 10;114(3):324–339. doi: 10.1016/j.jnma.2022.02.004

Table 3.

Barriers to clinical trial

Mistrust
in the
Medical
And
Scientific
Community
Safely
and
Efficacy
of
Procedure
or
Medicati
on
Fear of
Experimentation
or
Randomization
Limited
understanding/access
to info
about clinical
trials
Time
Commitment
and/or
location
concerns
Patient-
Researcher
Relationship
Financial
burden
(i.e.
inadequate
insurance,
no
compensati
on, lack of
research
funding)
Caregiving
Duties
Inadequate
Transport
Limited
understanding
of the
informed
consent
process
Reputation
of
Medical
Professional
or
Facility
Work
Commitment
Unequa
l
Treatment
Religious
Beliefs
Physical
Discomfort
Lack
of
Interest
Unexpected Event
(e.g.,
illness,
incarnation, or
oversleeping
Author/Year Sample Size Sex
Baquet, C. et al., 2006 561 Female x x
BeLue, R et al., 2006 35 Female x x x
32 Male x x x x x
Brewer, L. et al., 2014 381 Female x
Brooks, M.M. et al., 2009 29 Female x x x x x x x x
Brown, D. et al., 2000 x x x
Study 1 64 Female
Brown, D. et al., 2000 x x x
Study 2 61 Female
Farmer, D. et al., 2007 61 Female x x x x x x x x x
Frierson, G. et al., 2019 57 Female x x x x x x x
Haynes-Maslow, L. et al., 2014 82 Female x x x x x x
Lang, R. et al., 2013 69 Female x x x x
35 Male x x
Linden, H. et al., 2007 58 Female x x x x x x x x x x
Martin, A et al., 2013 36 Female x x x
Newman, P. et al., 2006 8 Female x
Owens, O. et al., 2013 43 Female x x x x x x x x
38 Male x x x x x x x x
Rivers, D. et al., 2019 42 Female x x x x x x
Smith, Y. et al., 2007 31 Female x x x x x x x
Trauth, J. et al., 2005 299 Female x x x x x x
Unson, C. et al., 2001 16 Female x x x x x x
Voytek, C. et al., 2011 17 Female x x x x x x x x x

NOTE: This table lists each study included in the systematic review and whether the specific barrier to participation in clinical trials was identified by the study’s male and/or female subjects.