Mark Williams

Mark Williams

orcid

Research Focus & Metrics

Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2010 in Journal of Manipulative and Physiological Therapeutics
Verified
Journal Article
Closed access
MWMark Williams
Mark Williams
CMChristopher J. McCarthy
Christopher J. McCarthy
ACAngeliki Chorti
Angeliki Chorti
MCMatthew W. Cooke
Matthew W. Cooke
SGSimon Gates
Simon Gates
The purpose of this study was to systematically review the literature evaluating the reliability and validity of all available methods for measuring active and passive cervical range of motion (CROM). Electronic databases (PubMed, MEDLINE, CINAHL, EMBASE, and AMED) were searched through OVID from their inception to January 2008. Articles were selected according to a priori defined criteria. Data were extracted regarding publication details, type of study, movements and device evaluated, subject and observer characteristics, and measurement protocol including blinding and statistical analysis methods. Quality assessment was undertaken using developed criteria to assess internal validity, external validity, and statistical methods. An estimate of the level of reliability and validity was calculated and used to categorize studies as good, moderate, or poor. A total of 56 articles fulfilled the selection criteria and were included in the review. Forty-six of these articles described 66 reliability studies and 21 described 21 concurrent criterion validity studies. Twelve different methods were evaluated. Although it was the intention of this review to conduct meta-analysis, this was deemed inappropriate due to studies being too heterogeneous. Most of the reliability and validity studies involved asymptomatic subjects measured by allied health professionals investigating active ROM. Devices that were deemed to have "good" reliability and validity were the CROM device, the Spin-T goniometer, and the single inclinometer. A considerable number of reliability and concurrent validity studies have been published for CROM. The CROM device has undergone most evaluation and has been shown to be clinimetrically sound. Further research with significantly improved methodology and reporting is warranted for all devices.

1 February 2013 in The Lancet
Verified
Journal Article
Closed access
Sarah LambSarah Lamb
Sarah Lamb
SGSimon Gates
Simon Gates
MWMark Williams
Mark Williams
EWEsther M Williamson
Esther M Williamson
SMShahrul Mt-Isa
Shahrul Mt-Isa
MUMartin R Underwood
Martin R Underwood

1 March 2008 in Pain
Verified
Journal Article
Closed access
EWEsther Williamson
Esther Williamson
MWMark Williams
Mark Williams
SGSimon Gates
Simon Gates
Sarah LambSarah Lamb
Sarah Lamb
This systematic literature review aims to assess the prognostic value of psychological factors in the development of late whiplash syndrome (LWS). We included prospective cohort studies that provided a baseline measure of at least one psychological variable and used outcome measures relating to LWS (i.e. pain or disability persisting 6 months post injury). A search of electronic databases (Pubmed, Medline, Cinahl, Embase and Psychinfo) up to August 2006 was done using a predetermined search strategy. Methodological quality was assessed independently by two assessors. Data extraction were carried out using a standardised data extraction form. Twenty-five articles representing data from 17 cohorts were included. Fourteen articles were rated as low quality with 11 rated as adequate quality. Meta-analysis was not undertaken due to the heterogeneity of prognostic factors, outcome measures and methods used. Results were tabulated and predefined criterion applied to rate the overall strength of evidence for associations between psychological factors and LWS. Data on 21 possible psychological risk factors were included. The majority of findings were inconclusive. Limited evidence was found to support an association between lower self-efficacy and greater post-traumatic stress with the development of LWS. No association was found between the development of LWS and personality traits, general psychological distress, wellbeing, social support, life control and psychosocial work factors. The lack of conclusive findings and poor methodological quality of the studies reviewed highlights the need for better quality research. Self-efficacy and post-traumatic distress may be associated with the development of LWS but this needs further investigation.

1 December 2007 in Spine
Verified
Journal Article
Closed access
MWMark Williams
Mark Williams
EWEsther Williamson
Esther Williamson
SGSimon Gates
Simon Gates
Sarah LambSarah Lamb
Sarah Lamb
MCMatthew Cooke
Matthew Cooke
Systematic Review. To summarize evidence concerning physical prognostic factors for development of Late Whiplash Syndrome (LWS). There have been 3 previous systematic reviews of prognosis of whiplash with conflicting findings. The Quebec Task Force concluded that high priority should be given to determining prognostic factors. Subsequently their review was updated by Cote et al (Spine 2001;26:E445-58) and most recently by Scholten-Peeters et al (Pain 2003;104:303-22). We searched electronic databases from their inception to August 2006 using a prespecified search strategy. We included prospective cohort and case control studies that studied physical prognostic factors at baseline. Two independent reviewers selected articles, extracted data, and assessed quality. Meta-analysis was not performed due to the heterogeneity between studies. Instead, levels of evidence were generated by grouping similar findings from cohorts. Thirty-eight articles from 26 cohorts were reviewed. The majority of articles (25 of 38) were rated as low quality. No studies were rated as high quality. Only a minority of studies used validated prognostic measures and/or outcome measures. High initial neck pain intensity, neck pain related disability, and cold hyperalgesia all had moderate evidence for an association with the development of LWS. No factor was rated as having strong evidence. Pain has a central role to play as a prognostic factor for the development of LWS. Other physical factors commonly used in the clinical setting showed inconclusive evidence for their influence on prognosis. There is a need for improved quality of studies with consistent use of validated measures of all categories of prognostic factors and outcome. This may then provide a clearer understanding of prognosis of Whiplash Associated Disorders and therefore facilitate effective management of this costly problem.

1 March 2015 in Health Technology Assessment
Verified
Journal Article
Open access
PDF file
MWMark Williams
Mark Williams
EWEsther M Williamson
Esther M Williamson
PHPeter J Heine
Peter J Heine
VNVivien Nichols
Vivien Nichols
MGMatthew J Glover
Matthew J Glover
Sarah LambSarah Lamb
Sarah Lamb
Background: The effectiveness of exercise for improving hand and wrist function in people with rheumatoid arthritis (RA) is uncertain.Objectives: 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.Design: A pragmatic, multicentred, individually randomised controlled trial with an embedded qualitative study. Outcome assessors were blind to group assignment and independent of treatment delivery.Setting: Seventeen NHS trusts in England comprising 21 rheumatology and therapy departments.Participants: 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.Interventions: 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.Main outcome measures: 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.Results: 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.Conclusions: 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.Study registration: Current Controlled Trials ISRCTN 89936343.Funding details: This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full inHealth 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.

24 January 2017 in Health and Quality of Life Outcomes
Verified
Journal Article
Open access
PDF file
MDMelina Dritsaki
Melina Dritsaki
Stavros PetrouStavros Petrou
Stavros Petrou
MWMark Williams
Mark Williams
Sarah LambSarah Lamb
Sarah Lamb
The aim of this study was to assess the psychometric properties, namely acceptability, validity, reliability, interpretability and responsiveness of the EuroQol EQ-5D (EQ-5D visual analogue (VAS) and EQ-5D (utility)), Short Form 12 Dimensions (SF-12), SF-6D and Michigan Hand Outcome Questionnaire (MHQ) in patients with rheumatoid arthritis (RA) of the hand. The empirical investigation was based upon data from a randomised controlled trial of 488 adults with rheumatoid arthritis who had pain and dysfunction of the hands and/or wrists. Participants completed the EQ-5D, SF-12 and MHQ at baseline and at 4 and 12 months follow up. Acceptability was measured using completion rates over time; construct validity using the “known groups” approach, based on pain troublesomeness; convergent validity using spearman’s rho correlation (ρ); reliability using internal consistency (Cronbach’s alpha); interpretability using minimal important differences (MID); and responsiveness using effect sizes and standardised response means (SRM) stratified by level of self-rated improvement in hand and wrist function or level of self-rated benefit and satisfaction from trial treatments. At baseline, the study population had a mean age of 62.4 years, a mean MHQ score of 52.1 and included 76% women. The EQ-5D (utility) had the highest completion rates across time points. All instruments discriminated between pre-specified groups based on pain troublesomeness. Convergent validity analysis indicated that the MHQ score correlated strongly with the EQ-5D (ρ = 0.65) and SF-6D (ρ = 0.63) utility scores. The MHQ was most responsive at detecting change in indicators of RA pain severity between baseline and 4 months, whilst minimal important differences varied considerably across PROMs. The instruments evaluated in this study displayed varying psychometric properties in the context of RA of the hand. The selection of a preferred instrument in evaluative studies should ultimately depend on the relative importance placed on individual psychometric properties and the importance placed on generation of health utilities for economic evaluation purposes.