Friday, 23 November 2012

Knee arthroplasty rates soar for "crouching" Chinese women

by Michael Woodhead
The number of patients undergoing primary total knee arthroplasty in China has  increased enormously over the last decade, especially among women, Beijing research shows.
Researchers from Peking University Third Hospital analysed data from 3118 Chinese patients who underwent the procedure over the period of 2000–2011.
They found that total knee arthroplasties were performed on 511 males and 2607 females in the hospital during the ten years.  The annual incidence of primary total knee arthroplasty increased from 35 knees in 2000 to 681 knees in 2011. The average annual percentage increase in operation rates was 33%. As expected, the highest incidence knee arthroplasty was in people aged 65–74 years. Surprisingly, however, females accounted for 83% of the patients who underwent primary total knee arthroplasty.
 The researchers say the higher incidence of female patients undergoing primary total knee arthroplasty  may be due to a higher prevalence of advanced knee osteoarthritis in older women.  "There are lifestyle differences between Asian and Western females that may lead to the higher prevalence of primary total knee arthroplasty among [Asians] ... for example, Chinese women tend to use the squatting posture more often than Western women in daily activities, such as for toileting and house chores," they say.
They conclude that their study has demonstrated a rapid increase in the incidence of primary total knee arthroplasty in the Chinese  population.
Read more: Chinese Medical Journal

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