作者hunghuhu (huhu)
看板Medicine
标题[问题] 有关流行病学的问题
时间Mon Nov 2 00:23:23 2009
题目说:
Let P denote the prevalence of a disease in a population and Px the proportion of positives in a screening of that population. Suppose that the screening method's sensitivity and specificity are both 95%. Calculate Px/P for different value of P. Draw a diagram to illustrate the relation.
我翻译为:
P是人口当中罹患疾病的盛行率.Px是人口当中筛选出来是阳性的比例.假设精确度.敏感度都是95%.""计算Px/P对P.""画图并详述.
我不太懂Calculate Px/P for different value of P.翻译起来是什麽意思??
可不可以请董的人帮我解释一下.
他的答案是一张图表.可是我看不懂的的意思是什麽!?
可不可以请会的人帮我解答.并告诉我为什麽!
谢谢~
感激不尽~>"<
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