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2017 ; 17
(1
): 419
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gab.com Text
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The development and appraisal of a tool designed to find patients harmed by
falsely labelled, falsified (counterfeit) medicines
#MMPMID28633634
An?elkovi? M
; Björnsson E
; De Bono V
; Diki? N
; Devue K
; Ferlin D
; Han?eva?ki M
; Jónsdóttir F
; Shakaryan M
; Walser S
BMC Health Serv Res
2017[Jun]; 17
(1
): 419
PMID28633634
show ga
BACKGROUND: Falsely labelled, falsified (counterfeit) medicines (FFCm's) are
produced or distributed illegally and can harm patients. Although the occurrence
of FFCm's is increasing in Europe, harm is rarely reported. The European
Directorate for the Quality of Medicines & Health-Care (EDQM) has therefore
coordinated the development and validation of a screening tool. METHODS: The tool
consists of a questionnaire referring to a watch-list of FFCm's identified in
Europe, including symptoms of their use and individual risk factors, and a
scoring form. To refine the questionnaire and reference method, a pilot-study was
performed in 105 self-reported users of watch-list medicines. Subsequently, the
tool was validated under "real-life conditions" in 371 patients in 5 ambulatory
and in-patient care sites ("sub-studies"). The physicians participating in the
study scored the patients and classified their risk of harm as "unlikely" or
"probable" (cut-off level: presence of ?2 of 5 risk factors). They assessed all
medical records retrospectively (independent reference method) to validate the
risk classification and documented their perception of the tool's value. RESULTS:
In 3 ambulatory care sites (180 patients), the tool correctly classified 5
patients as harmed by FFCm's. The positive and negative likelihood ratios
(LR+/LR-) and the discrimination power were calculated for two cut-off levels: a)
1 site (50 patients): presence of two risk factors (at 10% estimated health care
system contamination with FFCm's): LR?+?4.9/LR-0, post-test probability: 35%; b)
2 sites (130 patients): presence of three risk factors (at 5% estimated
prevalence of use of non-prescribed medicines (FFCm's) by certain risk groups):
LR?+?9.7/LR-0, post-test probability: 33%. In 2 in-patient care sites (191
patients), no patient was confirmed as harmed by FFCm's. The physicians perceived
the tool as valuable for finding harm, and as an information source regarding
risk factors. CONCLUSIONS: This "decision aid" is a systematic tool which helps
find in medical practice patients harmed by FFCm's. This study supports its value
in ambulatory care in regions with health care system contamination and in
certain risk groups. The establishment of systematic communication between
authorities and the medical community concerning FFCm's, current patterns of use
and case reports may sustain positive public health impacts.