title: The effect of obesity and increasing age on operative time and length of stay in primary hip and knee arthroplasty.
abstract: We retrospectively reviewed 589 patients undergoing lower-limb arthroplasty, recording age, body mass index (BMI) and co-morbidities. The effect of these on operative duration and length of stay (LOS) was analysed. For a 1 point increase in BMI we expect LOS to increase by a factor of 2.9% and mean theatre time to increase by 1.46minutes. For a 1-year increase in age, we expect LOS to increase by a factor of 1.2%. We have calculated the extra financial costs associated. The current reimbursement system underestimates the financial impact of BMI and age. The results have been used to produce a chart that allows prediction of LOS following lower limb arthroplasty based on BMI and age. These data are of use in planning operating lists.
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: Ben M
authors: BM
authors: Bradley
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: Shelly N
authors: SN
authors: Griffiths
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: Kyle J
authors: KJ
authors: Stewart
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: Gordon A
authors: GA
authors: Higgins
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: Michael
authors: M
authors: Hockings
authors: Dept. Trauma Orthopaedics, Torbay Hospital, South Devon Hospitals NHS Trust, Devon, UK.
authors: David L
authors: DL
authors: Isaac
mesh_terms: D000367:Age Factors; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000191:economics*; D015992:Body Mass Index; D015897:Comorbidity; D005260:Female; D006801:Humans; D007902:Length of Stay / Q000191:economics; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications / Q000191:economics*; D061646:Operative Time; D020370:Osteoarthritis, Knee / Q000601:surgery*; D012189:Retrospective Studies; D012307:Risk Factors
keywords: financial cost; hip and knee arthroplasty; length of stay; obesity; theatre time