title: Weight and activity change in overweight and obese patients after primary total knee arthroplasty.
abstract: Few studies have examined the effect of primary total knee arthroplasty on the weight and physical activity of overweight and obese patients in the United States. We conducted a prospective study of changes in mean weight, body mass index (BMI), and physical activity over 2 years in 188 consecutive overweight or obese patients. Weight, BMI, and physical activity, evaluated using the Lower Extremity Activity Scale (LEAS), were assessed preoperatively and at 1 and 2 years. At 2 years, no significant weight change was found (P = .80), but BMI increased by 0.46 kg/m(2) (P = .049). The LEAS score increased from preoperatively to 2 years (P < .001). Preoperative LEAS score was not associated with weight or BMI at 2 years. This finding has implications for patient expectations and preoperative counseling.
authors.affiliation: Department of Orthopaedics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7055, USA.
authors.forename: Anne M
authors.initials: AM
authors.lastname: Lachiewicz
authors.forename: Paul F
authors.initials: PF
authors.lastname: Lachiewicz
mesh_terms: D000328:Adult; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000534:rehabilitation; D015992:Body Mass Index; D001835:Body Weight; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D009765:Obesity / Q000453:epidemiology; D011446:Prospective Studies