Letter to the editor: The functional outcome of hip resurfacing and large-head THA is the same: a randomized, double-blind study.

摘要

Dr. Lavigne and his coauthors [2] performed a PRCT to address a question that needs to be answered urgently: can resurfacing provide superior function over conventional hip replacement for active patients that might make the reported higher risk of reoperation worthwhile?However, their power calculation was based on the premise that anything less than a 12% increase in normal walking speed would not be significant on the grounds that an earlier study had found such a difference between patients who had hip resurfacing and those with an arthritic hip [3]. This position is obtuse. The difference between the comfortable walking speeds of fit men in their 30s and 70s is only 0.13 m/second or less than 10% [1].