Personne : Zongo, Arsène
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Zongo
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Arsène
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Université Laval. Faculté de pharmacie
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ncf11889020
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Publication Accès libre Polypharmacy definitions for multimorbid older adults need stronger foundations to guide research, clinical practice and public health.(MDPI AG, 2019-08-29) Zongo, Arsène; Domingues, Nélia Sofia; Kröger, Edeltraut; Lunghi, Carlotta; Guénette, Line; Sirois, CarolineThere are numerous definitions of polypharmacy to describe the use of many medications among older adults, but there is a need to clarify if they are purposive and meaningful. By means of a systematic review, we identified definitions of polypharmacy used in multimorbid older adults (≥65 years). We evaluated if the definitions align among the domains of research, clinical practice, and public health and appraised whether concepts of polypharmacy are based on strong foundations. More than 46 definitions of polypharmacy were retrieved from 348 publications (research: n = 243; clinical practice: n = 88; public health: n = 17). Several thresholds based on the number of medications were mentioned. The majority of the publications (n = 202, 58%) used a minimal threshold of five medications. Heterogeneous qualitative definitions were identified, mostly stating that polypharmacy is “more drugs than needed”. There was no significant divergence between domains as to the type of definitions used, although qualitative definitions were more common in clinical practice. Nearly half (n = 156, 47%) of the publications provided no justification for the polypharmacy definition used. The wide variety of definitions for polypharmacy precludes comparisons, appropriate identification and management of polypharmacy in multimorbid older adults. Standardized definitions would allow more coherent judgments regarding the individual and collective stakes of polypharmacy.Publication Accès libre Revisiting the internal consistency and factorial validity of the 8-item Morisky Medication Adherence Scale(SAGE Publications, 2016-10-19) Grégoire, Jean-Pierre; Zongo, Arsène; Guillaumie, Laurence; Lauzier, Sophie; Moisan, Jocelyne; Guénette, LineObjective: To assess the internal consistency and factorial validity of the adapted French 8-item Morisky Medication Adherence Scale in assessing adherence to noninsulin antidiabetic drug treatment. Study Design and Setting: In a cross-sectional web survey of individuals with type 2 diabetes of the Canadian province of Quebec, self-reported adherence to the antidiabetes drug treatment was measured using the Morisky Medication Adherence Scale-8. We assessed the internal consistency of the Morisky Medication Adherence Scale-8 with Cronbach’s alpha, and factorial validity was assessed by identifying the underlying factors using exploratory factor analyses. Results: A total of 901 individuals completed the survey. Cronbach’s alpha was 0.60. Two factors were identified. One factor comprised five items: stopping medication when diabetes is under control, stopping when feeling worse, feeling hassled about sticking to the prescription, reasons other than forgetting and a cross-loading item (i.e. taking drugs the day before). The second factor comprised three other items that were all related to forgetfulness in addition to the cross-loading item. Conclusion: Cronbach’s alpha of the adapted French Morisky Medication Adherence Scale-8 was below the acceptable value of 0.70. This observed low internal consistency of the scale is probably related to the causal nature of the items of the scale but not necessarily a lack of reliability. The results suggest that the adapted French Morisky Medication Adherence Scale-8 is a two-factor scale assessing intentional (first factor) and unintentional (second factor) non-adherence to the noninsulin antidiabetes drug treatment. The scale could be used to separately identify these outcomes using scores obtained on each of the sub-scales.