Slip, trip and fall (STF) injuries are a serious problem and impose a significant burden on society. According to the Liberty Mutual Safety Index [Liberty Mutual Research Institute for Safety (LMRIS), 2009], costs for disabling workplace injuries in 2007 due to falls on the same level were approximately $7.7 billion or 14.6% of costs, and falls to a lower level were $6.2 billion or 11.7%
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机译：滑倒，绊倒和跌倒（STF）伤害是一个严重的问题，给社会带来了沉重的负担。根据Liberty Mutual Safety Index [Liberty Mutual Institute for Safety（LMRIS），2009]，2007年因处于同一水平而导致工作场所伤残的成本约为77亿美元，占成本的14.6％，并且下降到更低的水平水平为62亿美元或11.7％
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