Assignment: The Survey Instrument
Assignment: The Survey Instrument
White, non-Hispanic). The South Boston Com-
munity Health Center is a community health centre
affiliated with BMC, which serves a mostly White,
non-Hispanic, low-income patient population.
The survey instrument included a cover letter, 23
closed-ended questions and two open-ended
questions. Much of the content was derived from
instruments used in previously published studies
by Holmes-Rovner et al. and Graham et al.6,15
The cover letter briefly described the purpose of
the study, a statement that participation was
completely voluntary, the approximate amount
of time required to complete the survey, and a
statement that all responses are anonymous and
confidential. The closed-ended questions include
one item related to eligibility [confirmation of
participation in the clinical trial (yes ⁄no)], two items related to demographics (provider degree
and year of graduation), 12 items related to
perspectives on the impact of the tool on various
patient and provider components of SDM for
Colorectal cancer screening decision aid, P C Schroy, S Mylvaganam and P Davidson
� 2011 John Wiley & Sons Ltd Health Expectations, 17, pp.27–35
CRC screening (see Table 1), and eight items
related to perspectives on implementation or
content modification (see Tables 2 and 3). The
framing of the questions inferred a comparison
between patients exposed to the decision aid and
those not exposed, i.e., standard care patients,
regardless of their involvement in the study. All
of the items related to SDM used a 5-point Likert
scale ranging from 1 (strongly disagree) to 5
(strongly agree). Six of the items related to
implementation or content modification also
used the same 5-point Likert scale, and two used
a single best answer format. The two open-ended
questions inquired about suggestions for
improving the decision aid and complaints. The
questionnaire took �10 min to complete.
Descriptive statistics were used to characterize
the study population and response data for all
closed-ended questions. Frequency data for the
5-point Likert scale
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