Increase in Incidence of Knee Arthroplasty in Finland

From 1980 to 2006, increase in knee arthroplasties mostly in those aged 50 to 59 years

WEDNESDAY, Jan. 18 (HealthDay News) -- The incidence of total knee arthroplasties (TKAs) and unicondylar knee arthroplasties (UKAs) increased in Finland from 1980 to 2006, with most of the increase occurring in those aged 50 to 59 years, according to a study published online Jan. 17 in Arthritis & Rheumatism.

Jarkko Leskinen, M.D., from Helsinki University Central Hospital, and colleagues examined the incidence of TKA and UKA in Finland from 1980 to 2006. Data were collected from the Finnish Arthroplasty Registry and from Statistics Finland.

The investigators found that, from 1980 to 2006, among 30- to 59-year-olds, the annual cumulative incidence of UKA and TKA increased rapidly; most of the increase occurred in those aged 50 to 59 years. The incidence increased from 0.2 to 10 and from 0.5 to 65 procedures per 100,000 inhabitants for UKAs and TKAs, respectively. Throughout the study period, the incidence remained higher for women. There was a more rapid elevation in the incidence in low- and intermediate-volume hospitals.

"Our study confirmed rapid growth in incidences of partial and total knee arthroplasty in those less than 60 years of age. Given that younger patients may be at higher risk of artificial knee joint failure and thus in need of a second replacement surgery, long-term data are needed before widespread use of total knee arthroplasty is recommended for this patient population," Leskinen said in a statement.

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