In America, on average 340,000 elderly people break bones through falls each year, with 40 % never fully able to walk unassisted again, and with medical expenses as high as US $ 12.6 billion.
估計美國平均每年有 34 萬名老人跌倒骨折，40 % 康復後無法自己行走，醫療支出高達 126 億美元。