Evaluation of a very brief pedometer-based physical activity intervention delivered in NHS Health Checks in England: The VBI randomised controlled trial


Autoři: Wendy Hardeman aff001;  Joanna Mitchell aff002;  Sally Pears aff002;  Miranda Van Emmenis aff002;  Florence Theil aff002;  Vijay S. Gc aff003;  Joana C. Vasconcelos aff005;  Kate Westgate aff006;  Søren Brage aff006;  Marc Suhrcke aff004;  Simon J. Griffin aff006;  Ann Louise Kinmonth aff008;  Edward C. F. Wilson aff003;  A. Toby Prevost aff005;  Stephen Sutton aff002
Působiště autorů: Behavioural and Implementation Science Group, School of Health Sciences, University of East Anglia, Norwich Research Park, Norwich, United Kingdom aff001;  Behavioural Science Group, Primary Care Unit, Department of Public Health and Primary Care, Cambridge Institute of Public Health, Cambridge, United Kingdom aff002;  Health Economics Group, Norwich Medical School, University of East Anglia, Norwich, United Kingdom aff003;  Centre for Health Economics, University of York, York, United Kingdom aff004;  Imperial Clinical Trials Unit, Imperial College London, London, United Kingdom aff005;  MRC Epidemiology Unit, University of Cambridge, Cambridge, United Kingdom aff006;  Luxembourg Institute of Socio-Economic Research, Esch-sur-Alzette, Luxembourg aff007;  Primary Care Unit, Department of Public Health and Primary Care, Cambridge Institute of Public Health, Cambridge, United Kingdom aff008;  Cambridge Centre for Health Services Research, Department of Public Health and Primary Care, Cambridge Institute of Public Health, Cambridge, United Kingdom aff009
Vyšlo v časopise: Evaluation of a very brief pedometer-based physical activity intervention delivered in NHS Health Checks in England: The VBI randomised controlled trial. PLoS Med 17(3): e32767. doi:10.1371/journal.pmed.1003046
Kategorie: Research Article
doi: 10.1371/journal.pmed.1003046

Souhrn

Background

The majority of people do not achieve recommended levels of physical activity. There is a need for effective, scalable interventions to promote activity. Self-monitoring by pedometer is a potentially suitable strategy. We assessed the effectiveness and cost-effectiveness of a very brief (5-minute) pedometer-based intervention (‘Step It Up’) delivered as part of National Health Service (NHS) Health Checks in primary care.

Methods and findings

The Very Brief Intervention (VBI) Trial was a two parallel-group, randomised controlled trial (RCT) with 3-month follow-up, conducted in 23 primary care practices in the East of England.

Participants were 1,007 healthy adults aged 40 to 74 years eligible for an NHS Health Check. They were randomly allocated (1:1) using a web-based tool between October 1, 2014, and December 31, 2015, to either intervention (505) or control group (502), stratified by primary care practice. Participants were aware of study group allocation. Control participants received the NHS Health Check only. Intervention participants additionally received Step It Up: a 5-minute face-to-face discussion, written materials, pedometer, and step chart. The primary outcome was accelerometer-based physical activity volume at 3-month follow-up adjusted for sex, 5-year age group, and general practice. Secondary outcomes included time spent in different intensities of physical activity, self-reported physical activity, and economic measures. We conducted an in-depth fidelity assessment on a subsample of Health Check consultations.

Participants’ mean age was 56 years, two-thirds were female, they were predominantly white, and two-thirds were in paid employment. The primary outcome was available in 859 (85.3%) participants. There was no significant between-group difference in activity volume at 3 months (adjusted intervention effect 8.8 counts per minute [cpm]; 95% CI −18.7 to 36.3; p = 0.53). We found no significant between-group differences in the secondary outcomes of step counts per day, time spent in moderate or vigorous activity, time spent in vigorous activity, and time spent in moderate-intensity activity (accelerometer-derived variables); as well as in total physical activity, home-based activity, work-based activity, leisure-based activity, commuting physical activity, and screen or TV time (self-reported physical activity variables). Of the 505 intervention participants, 491 (97%) received the Step it Up intervention. Analysis of 37 intervention consultations showed that 60% of Step it Up components were delivered faithfully. The intervention cost £18.04 per participant. Incremental cost to the NHS per 1,000-step increase per day was £96 and to society was £239. Adverse events were reported by 5 intervention participants (of which 2 were serious) and 5 control participants (of which 2 were serious). The study’s limitations include a participation rate of 16% and low return of audiotapes by practices for fidelity assessment.

Conclusions

In this large well-conducted trial, we found no evidence of effect of a plausible very brief pedometer intervention embedded in NHS Health Checks on objectively measured activity at 3-month follow-up.

Trial registration

Current Controlled Trials (ISRCTN72691150).

Klíčová slova:

Accelerometers – Behavioral and social aspects of health – Cardiovascular diseases – Cost-effectiveness analysis – Nurses – Physical activity – Primary care – Randomized controlled trials


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