推 fishma:非常感謝您唷^^ 08/26 01:24
※ 引述《fishma ( )》之銘言：
: 53.
: There is a great deal of geographical variation in the frequency of
: many surgical procedures-up to tenfold varition per hundred thousand people
: among different areas in the numbers of hysterectomies, prostatectomies, and
: tonsillectomies.
: To support a conclusion that much of the varition is due to unnecessary
: surgical procedures, it would be most important to establish which of the
: following?
(B) The varition is unrelated to factors (other than the surgical procedures
themselves) that influence the incidence of diseases for which surgery
might be considered.
: 請問一下原題的意思是??
: 答案B，為什麼跟這些考慮要動手術的因素無關呢???
: OV詳解看不太懂 麻煩大家了 謝謝!!
如果有某些因素(factors), 確實會影響(influcnce)這些疾病的
發生機率(the incidence of deseases),
那就不能說這些手術是unnecessary.
(譬如說地區居民年紀較大或是當地環境的影響之類...)
反正若能證實(establish)手術頻率的差異與這些因素無關(unrelated),
就可以支持 "差異是由於許多不必要的手術所導致" 這樣的結論.
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