Figure 3.
Annual hospital costs attributed to overweight and obesity among women aged 55–79 years in England by types of musculoskeletal problems
Overweight and obesity is defined as a BMI of 25 kg/m2 or higher. These estimates were derived by applying the estimates of excess costs by BMI category for each defined subcomponent of chapter XIII (diseases of the musculoskeletal system and connective tissue) from the Million Women Study analysis to women aged 55–79 years in England using the Health Surveys for England 2012 and 2013 to estimate the population-level distribution of women by self-reported BMI category and UK Office for National Statistics mid-2013 population estimates (appendix p 2). Excess costs were calculated relative to a BMI category of 20 kg/m2 to less than 25 kg/m2, estimated as a weighted average of the estimates of the two subcategories (20 kg/m2 to <22·5 kg/m2 and 22·5 kg/m2 to <25 kg/m2). ICD-10=International Classification of Disease 10th revision. OPCS=Office for Population Censuses and Surveys classification of surgical operations and procedures 4th revision. BMI=body-mass index.