The Minimal Clinically Important Difference of the Michigan Hand Outcomes Questionnaire
ABSTRACT To determine the change in score required in various domains of the Michigan Hand Outcomes Questionnaire (MHQ) to indicate meaningful patient improvement, or the minimal clinically important difference (MCID), for 3 common hand conditions: rheumatoid arthritis (RA), carpal tunnel syndrome (CTS) and distal radius fracture (DRF).
The MHQ was administered to patients at 2 time points. Patient satisfaction was defined as a satisfaction score > or =80% of the standard deviation of that patient sample. The minimal change in score in specific MHQ domains that corresponded with patient satisfaction was determined using receiver operating characteristic curves.
For CTS patients, MCIDs of 23, 13, and 8 were identified for the pain, function, and work domains, respectively. For RA patients, pain and function were also identified as having discriminative ability, with MCIDs of 11 and 13, respectively. An MCID of 3 was identified for the activities of daily living domain. For DRF patients, no MHQ domains showed discriminative ability because of the ceiling effect at the 3-month assessment period.
Individual domains of the MHQ can be used to discriminate between patients who are satisfied and those who are not after either carpal tunnel release or silicone arthroplasty of the metacarpophalangeal joints for RA. Pain and function are the domains of the MHQ that are best able to discriminate between patients who are satisfied and those who are not. The identical function MCID for both RA patients and CTS patients, despite markedly different preoperative values, indicates that a standard amount of functional change may indicate patient satisfaction. High postoperative satisfaction, even only 3 months after surgery, prevented any domains from showing discriminative ability for the DRF patients.
SourceAvailable from: Dariush Nikkhah
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ABSTRACT: Minimal important changes and differences describe the smallest changes and differences between individuals that are relevant to patients following treatment. Minimal important differences may vary between conditions, treatments and lengths of follow-up, and can be calculated in different ways. Minimal important differences for elective hand surgery were reviewed. A total of 99 minimal important differences were identified in 29 articles. The conditions, treatments, outcome measures used and follow-up periods are discussed. The Disabilities of the Arm, Shoulder and Hand had the most estimates of minimal important differences, but these varied. The methods used in the included studies were reviewed and appraised. Most minimal important differences were calculated using retrospective anchors. Future research directions in this area are suggested. Level of evidence: IIJournal of Hand Surgery (European Volume) 10/2014; DOI:10.1177/1753193414553908 · 2.19 Impact Factor
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ABSTRACT: The effectiveness of exercise for improving hand and wrist function in people with rheumatoid arthritis (RA) is uncertain. The study aims were (1) to estimate the clinical effectiveness and cost-effectiveness of adding an optimised exercise programme for hands and upper limbs to standard care for patients with RA; and (2) to qualitatively describe the experience of participants in the trial with a particular emphasis on acceptability of the intervention, exercise behaviours and reasons for adherence/non-adherence. A pragmatic, multicentred, individually randomised controlled trial with an embedded qualitative study. Outcome assessors were blind to group assignment and independent of treatment delivery. Seventeen NHS trusts in England comprising 21 rheumatology and therapy departments. Adults with RA who had pain and dysfunction of the hands and/or wrists and had been on stable medication for at least 3 months. Patients were excluded if they were under 18 years old, had undergone upper limb surgery/fracture in the last 6 months, were on a waiting list for upper limb surgery or were pregnant. Usual care or usual care plus an individualised exercise programme. Usual care consisted of joint protection education, general exercise advice and functional splinting if required. The exercise programme consisted of six sessions of strengthening and stretching exercises with a hand therapist, daily home exercises and strategies to maximise adherence. The primary outcome was the Michigan Hand Outcome Questionnaire (MHQ) overall hand function subscale score at 12 months. Secondary outcome measures included the full MHQ, pain, health-related quality of life (Short Form questionnaire-12 items), impairment (grip strength, dexterity and range of motion) and self-efficacy. European Quality of Life-5 Dimensions, medication and health-care use were collected for the health economics evaluation. Follow-up was at 4 and 12 months post randomisation. Analysis was performed on an intention-to-treat basis. We randomised 490 patients (244 to usual care, 246 to exercise programme). Compliance with the treatments was very good (93% of usual care participants and 75% of exercise programme participants completed treatment). Outcomes were obtained for 89% of participants at 12 months (222 for usual care, 216 for exercise programme). There was a statistically significant difference in favour of the exercise programme for the primary outcome at 4 and 12 months [mean difference 4.6 points, 95% confidence interval (CI) 2.2 to 7.0 points; and mean difference 4.4 points, 95% CI 1.6 to 7.1 points, respectively]. There were no significant differences in pain scores or adverse events. The estimated difference in mean quality-adjusted life-years (QALYs) accrued over 12 months was 0.01 greater (95% CI -0.03 to 0.05) in the exercise programme group. Imputed analysis produced incremental cost-effectiveness ratio estimates of £17,941 (0.59 probability of cost-effectiveness at willingness-to-pay threshold of £30,000 per QALY). The qualitative study found the exercise programme to be acceptable and highlighted the importance of the therapist in enabling patients to establish a routine and incorporate the exercises into their lives. The results of the Strengthening And stretching for Rheumatoid Arthritis of the Hand trial suggest that the addition of an exercise programme for RA hands/wrists to usual care is clinically effective and cost-effective when compared with usual care alone. No adverse effects were associated with the exercise programme. The economic analysis suggests that the intervention is likely to be cost-effective. Current Controlled Trials ISRCTN 89936343. This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 19, No. 19. See the NIHR Journals Library website for further project information. This report has been developed in association with the NIHR Collaboration for Leadership in Applied Health Research and Care Oxford and the NIHR Biomedical Research Unit Funding Scheme. This project benefited from facilities funded through Birmingham Science City Translational Medicine Clinical Research and Infrastructure Trials Platform, with support from Advantage West Midlands.Health technology assessment (Winchester, England) 03/2015; 19(19):1-222. DOI:10.3310/hta19190 · 5.12 Impact Factor