• J Pain · Feb 2024

    The Medication Quantification Scale 4.0: An updated index based on prescribers' perceptions of the risk associated with chronic pain medications.

    • Gwenaelle De Clifford-Faugère, Hermine Lore Nguena Nguefack, Marimée Godbout-Parent, Mamadou Aliou Diallo, Line Guénette, Gabrielle PagéMMResearch Center, Centre Hospitalier de l'Université de Montréal, Montreal, Quebec, Canada; Department of Anesthesiology and Pain Medicine, Université de Montréal, Montreal, Quebec, Canada., Manon Choinière, Robert Norman Harden, Sylvie Beaudoin, Aline Boulanger, Anne Marie Pinard, David Lussier, Philippe De Grandpré, Simon Deslauriers, and Anaïs Lacasse.
    • Department of Health Sciences, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, Quebec, Canada.
    • J Pain. 2024 Feb 1; 25 (2): 508521508-521.

    AbstractTo quantify risks associated with drug utilization in the real world for the treatment of chronic pain (CP), an index called the Medication Quantification Scale (MQS) was developed in 1992 in the United States and last updated in 2003. This study aimed to update, adapt to the contemporary Canadian context, and validate a revised version of the MQS (the MQS-4.0). Step 1: An expert committee adapted the MQS to the Canadian clinical practice context. Step 2: An update of risk weights given to medication subclasses was achieved using a prescriber survey (weights were derived from median 0-10 scores given to each subclass). Step 3: Construct validity of the MQS-4.0 was assessed after applying risk weights to the medication use profile of persons living with CP covered by public drug insurance plan. Thirty-six medication subclasses were included in the MQS-4.0. A total of 207 prescribers (physicians, pharmacists, and nurse practitioners) participated in the perception survey; 10.63% identified as pain specialists. When risk weights were applied to prescription claims (n = 9,122), the MQS-4.0 score was associated (P < .05) with the MQS-III score and variables associated with polypharmacy (eg, Charlson Comorbidity Index, number of prescribers or health care visits). This study provides an updated index intended for adult populations based on prescribers' perceptions of the risk associated with CP medications that can be useful for clinical practice and research among persons living with CP in Canada. It will, however, be relevant to verify whether similar risk weights are obtained in future pain specialist surveys. PERSPECTIVE: The MQS-4.0 is an update of the MQS used for quantifying the risk associated with the use of analgesics/coanalgesics. Adequate psychometrics properties were found.Copyright © 2024 United States Association for the Study of Pain, Inc. Published by Elsevier Inc. All rights reserved.

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