Non Surgical Priority 10 from the Early Hip and Knee Osteoarthritis PSP

UNCERTAINTY: When does Body Mass Index (BMI) impact on the progression of early OA? (JLA PSP Non Surgical Priority 10)
Overall ranking amongst non surgical questions	10
JLA question ID	0041/20
Extra explanatory note	This was discussed in context with No 4 but felt that it was important to keep separate as it is modifiable and worth attention on its own. Group wanted to acknowledge the complex nature of why people have high BMI and especially the mental health, and public health aspects. Removed 'point' and prefer concept of a scale and/or range within which BMI impacts on progression. Type of research; Epidemiology research and probably a cohort approach. Existing data sets in OA and high BMI?
Evidence	None identified
Health Research Classification System category	Musculoskeletal

Extra information provided by this PSP
Original uncertainty examples	How much weight does a person need to loose to have an effect on the structure of the joint? ~ How much weight would a patient need to loose to improve the arthritis?
Submitted by	7 patient/carers, 6 clinicians, 1 carer&clinician, 1 H&K PSP (clinician)

PSP information
PSP unique ID	0041
PSP name	Early Hip and Knee Osteoarthritis
Total number of uncertainties identified by this PSP.	52 (To see a full list of all uncertainties identified, please see the detailed spreadsheet held on the JLA website)
Date of priority setting workshop	26 February 2016