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2015 ; 15
(ä): 79
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Validity and usability of a professional association s web-based knowledge
translation portal: American Physical Therapy Association s PTNow org
#MMPMID26450415
Deutsch JE
; Romney W
; Reynolds J
; Manal TJ
BMC Med Inform Decis Mak
2015[Oct]; 15
(ä): 79
PMID26450415
show ga
BACKGROUND: PTNow.org is an evidence-based, on-line portal created by a
professional membership association to promote use of evidence in practice and to
help decrease unwarranted variation in practice. The site contains synthesis
documents designed to promote efficient clinical reasoning. These documents were
written and peer-reviewed by teams of content experts and master clinicians. The
purpose of this paper is to report on the content and construct validity as well
as usability of the site. METHODS: Physical therapist participants used clinical
summaries (available in 3 formats--as a full summary with hyperlinks, "quick
takes" with hyperlinks, and a portable two-page version) on the PTNow.org site to
answer knowledge acquisition and clinical reasoning questions related to four
patient scenarios. They also responded to questions about ease of use related to
website navigation and about format and completeness of information using a 1-5
Likert scale. Responses were coded to reflect how participants used the site and
then were summarized descriptively. Preferences for clinical summary format were
analyzed using an analysis of variance (ANOVA) and a Dunnett T3 post hoc
analysis. RESULTS: Seventeen participants completed the study. Clinical relevance
and completeness ratings by experienced clinicians, which were used as the
measure of content validity, ranged from 3.1 to 4.6 on a 5 point scale. Construct
validity based on the information on the PTNow.org site was supported for
knowledge acquisition questions 66 % of the time and for clinical reasoning
questions 40 % of the time. Usability ratings for the full clinical summary were
4.6 (1.2); for the quick takes, 3.5 (.98); and for the portable clinical summary,
4.0 (.45). Participants preferred the full clinical summary over the other two
formats (F?=?5.908, P?=?0.007). One hundred percent of the participants stated
that they would recommend the PTNow site to their colleagues. CONCLUSION:
Prelimary evidence supported both content validity and construct validity of
knowledge acquisition, and partially supported construct validity of clinical
reasoning for the clinical summaries on the PTNow.org site. Usability was
supported, with users preferring the full clinical summary over the other two
formats. Iterative design is ongoing.