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A patient-centred approach to estimate total annual healthcare cost by body mass index in the UK Counterweight programme

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Tigbe, William W., Briggs, Andrew H. and Lean, M. E. J. (Michael Ernest John) (2013) A patient-centred approach to estimate total annual healthcare cost by body mass index in the UK Counterweight programme. International Journal of Obesity, Volume 37 (Number 8). pp. 1135-1139. doi:10.1038/ijo.2012.186

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Official URL: http://dx.doi.org/10.1038/ijo.2012.186

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Abstract

Background:

Previous studies, based on relative risks for certain secondary diseases, have shown greater healthcare costs in higher body mass index (BMI) categories. The present study quantifies the relationship between BMI and total healthcare expenditure, with the patient as the unit of analysis.

Methods:

Analyses of cross-sectional data, collected over 18-months in 2002–2003, from 3324 randomly selected patients, in 65 general practices across UK. Healthcare costs estimated from primary care, outpatient, accident/emergency and hospitalisation attendances, weighted by unit costs taken from standard sources.

Results:

In univariate analyses, significant associations (P<0.05) were found between total healthcare expenditure and all dependent variables (women>men, drinker<non-drinkers, smokers>non-smokers, and increasing with greater physical activity, age and BMI. In multivariate analysis, age, sex, BMI, smoking and alcohol consumption remained significantly associated with healthcare cost, and together explained just 9% of the variance in healthcare expenditure. Adjusted total annual healthcare cost was £16 (95% CI £11–£21) higher per unit BMI. All cost categories were significantly (P<0.003) higher for those with BMI >40 compared with BMI <20 kg m−2: prescription drugs (men: £390 versus £16; women: £211 versus £73), hospitalisation (men: £72 versus £0; women: £243 versus £107), primary care (men: £191 versus £69; women: £268 versus £153) and outpatient care (£234 versus £107 women only).

Conclusions:

Annual healthcare expenditure rose a mean of £16 per unit greater BMI, doubling between BMI 20–40 kg m−2. This gradient may be an underestimate if the lower-BMI patients with heights and weights recorded had other costly diseases.

Item Type: Journal Article
Divisions: Faculty of Medicine > Warwick Medical School > Health Sciences
Faculty of Medicine > Warwick Medical School
Journal or Publication Title: International Journal of Obesity
Publisher: Nature Publishing Group
ISSN: 0307-0565
Official Date: August 2013
Dates:
DateEvent
August 2013Published
Volume: Volume 37
Number: Number 8
Page Range: pp. 1135-1139
DOI: 10.1038/ijo.2012.186
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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