July 22, 2016
1 min read

Increased BMI, anxiety associated with higher total knee replacement-related costs

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Higher total knee replacement-related costs were associated with increased baseline BMI, anxiety and poor social support among patients with knee osteoarthritis, according to results.

Among 212 patients (66% women) with knee osteoarthritis (OA) who underwent total knee replacement (TKR), researchers collected patient-reported outcomes at baseline and 2 weeks, 3 months and 6 months after surgery, as well as health care use and cost data at baseline and 1 month, 2 months, 4 months and 6 months after surgery.

During the first 6 months after surgery, results showed a mean total TKR-related cost of $30,831, with the largest proportion of the cost represented by direct medical costs followed by indirect costs and direct non-medical costs. Prior to surgery, researchers estimated patients’ OA-related expenses were $1,809 per patient.

Increased costs during the first 6 months after surgery were associated with younger age, increased BMI and increased expenses related to knee OA prior to surgery, according to results. Researchers also found low social support, depression, anxiety, low levels of optimism and the belief that health was related to chance events increased costs. Overall, results showed increased total TKR-related costs were associated with higher BMI and anxiety and reduced positive social interaction. – by Casey Tingle


Disclosures: Waimann reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.