PMID- 33233343 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20201201 IS - 2077-0383 (Print) IS - 2077-0383 (Electronic) IS - 2077-0383 (Linking) VI - 9 IP - 11 DP - 2020 Nov 21 TI - Determining the Minimal Clinical Important Difference for Medication Quantification Scale III and Morphine Milligram Equivalents in Patients with Failed Back Surgery Syndrome. LID - 10.3390/jcm9113747 [doi] LID - 3747 AB - The Medication Quantification Scale III (MQS) is a tool to represent the negative impact of medication. A reduction in medication can serve as an indicator to evaluate treatment success. However, no cut-off value has yet been determined to evaluate whether a decrease in medication is clinically relevant. Therefore, the objective is to estimate the thresholds for the MQS and morphine milligram equivalents (MMEs) that best identify a clinically relevant important improvement for patients. Data from the Discover registry, in which patients with failed back surgery syndrome were treated with high-dose spinal cord stimulation, were used. Patient satisfaction was utilized to evaluate a clinically important outcome 12 months after stimulation. Anchor-based and distribution-based methods were applied to determine the minimal clinical important difference (MCID). Distribution-based methods revealed a value of 4.28 for the MQS and 33.61 for the MME as MCID. Anchor-based methods indicated a percentage change score of 41.2% for the MQS and 28.2% for the MME or an absolute change score of 4.72 for the MQS and 22.65 for the MME. For assessing a treatment outcome, we recommend using the percentage change score, which better reflects a clinically important outcome and is not severely influenced by high medication intake at baseline. FAU - Goudman, Lisa AU - Goudman L AUID- ORCID: 0000-0002-2271-9855 AD - Department of Neurosurgery, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Belgium. AD - Center for Neurosciences (C4N), Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Belgium. AD - STIMULUS Consortium (reSearch and TeachIng neuroModULation Uz bruSsel), Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium. AD - Pain in Motion International Research Group (PAIN), Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Belgium. FAU - Smedt, Ann De AU - Smedt A AD - Center for Neurosciences (C4N), Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Belgium. AD - STIMULUS Consortium (reSearch and TeachIng neuroModULation Uz bruSsel), Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium. AD - Department of Physical Medicine and Rehabilitation, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium. FAU - Forget, Patrice AU - Forget P AUID- ORCID: 0000-0001-5772-8439 AD - Institute of Applied Health Sciences, NHS Grampian, University of Aberdeen, Aberdeen AB25 2ZD, UK. FAU - Moens, Maarten AU - Moens M AUID- ORCID: 0000-0003-0577-5449 AD - Department of Neurosurgery, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Belgium. AD - Center for Neurosciences (C4N), Vrije Universiteit Brussel, Laarbeeklaan 103, 1090 Jette, Belgium. AD - STIMULUS Consortium (reSearch and TeachIng neuroModULation Uz bruSsel), Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium. AD - Department of Radiology, Universitair Ziekenhuis Brussel, Laarbeeklaan 101, 1090 Jette, Belgium. LA - eng GR - independent research grant/Medtronic Europe Sarl/ PT - Journal Article DEP - 20201121 PL - Switzerland TA - J Clin Med JT - Journal of clinical medicine JID - 101606588 PMC - PMC7700681 OTO - NOTNLM OT - clinical importance OT - minimal clinically important difference OT - responsiveness COIS- Patrice Forget has been an advisory board member for Grunenthal. Maarten Moens has received speaker fees from Medtronic and Nevro. There are no other conflicts of interests to declare. EDAT- 2020/11/26 06:00 MHDA- 2020/11/26 06:01 PMCR- 2020/11/21 CRDT- 2020/11/25 01:03 PHST- 2020/10/06 00:00 [received] PHST- 2020/11/14 00:00 [revised] PHST- 2020/11/20 00:00 [accepted] PHST- 2020/11/25 01:03 [entrez] PHST- 2020/11/26 06:00 [pubmed] PHST- 2020/11/26 06:01 [medline] PHST- 2020/11/21 00:00 [pmc-release] AID - jcm9113747 [pii] AID - jcm-09-03747 [pii] AID - 10.3390/jcm9113747 [doi] PST - epublish SO - J Clin Med. 2020 Nov 21;9(11):3747. doi: 10.3390/jcm9113747.