Background and Aims: Musculoskeletal (MSK) pain is a commonly reported obesity related co-morbidity. Our Weight Management Service is a national Tier 3 referral centre for the treatment of adults with severe obesity. As part of our service we deliver a 6 week weight management in-patient programme (WMIPP). This WMIPP involves a 1,100kcal liquid diet, intensive functional rehabilitation and psychology interventions. This study evaluates the impact of the WMIPP on MSK pain and function.
Methods: A retrospective analysis of the WMIPP databases was undertaken. Prevalence and intensity of MSK pain were established. Post programme changes in weight, pain [(numerical rating scale (NRS)] and function were established using the Wilcoxon Signed rank test and t-test. Measures of clinically significant change (CSC) in NRS scores (>30% change) were calculated. Missing data were not adjusted for.
Results: From June 2014 to January 2019, 72 patients completed the WMIPP.  Baseline BMI was 59.1 ±11 kg/m2. Low back pain (LBP) (77% - 49/64) and knee pain (72% - 46/64) were common. Post programme there were significant changes in weight, BMI, neck circumference (p<0.001), LBP and knee pain NRS scores (p≦0.017). CSC was seen in 40% (18/45) of patinets with LBP and 27% (12/44) with knee pain.  Significant improved function (6MWT, QOL and sleep duration) was also seen (p≤0.005). 
Conclusions: Prevalence of MSK pain is high in patients admitted to the WMIPP. The reduction in pain scores is very encouraging and highlights the holistic value of WMIPPs. Reducing pain levels has the potential to influence outcomes in the longer term.

CHANGES IN PAIN FOLLOWING A 6 WEEK WEIGHT MANAGEMENT IN-PATIENT PROGRAMME