【单选题】【消耗次数：1】
病例对照研究中，使用新发病例的优点是
①
需要的样本量小
②
保密性问题少
③
可减少回忆偏倚
④
ABC均不是
参考答案：
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相关题目
【单选题】
在病例对照研究中，比值比（OR）的含义是指:
①
病例组的发病率与对照组的发病率之比
②
病例组的发病率与对照组的发病率之差
③
病例组的暴露比值与对照组的暴露比值的比
④
病例组的暴露比值与对照组的暴露比值之差
【单选题】
以下哪种属于病例对照研究的缺点（ ）
①
不适合暴露比例高的因素
②
存在回忆偏倚
③
可以测定暴露和非暴露组疾病的率
④
研究周期长，失访率高
⑤
不适用于罕见病的研究
随机题目
【单选题】
留装订边的图样，装订边的尺寸是（ ）毫米。
①
Normal
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7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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10
②
15
③
20
④
25
【单选题】
化工制图中以下哪种铅笔用于加粗描深图线？
①
Normal
0
7.8 磅
0
2
false
false
false
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ZH-CN
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H
②
Normal
0
7.8 磅
0
2
false
false
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ZH-CN
X-NONE
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HB
③
Normal
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2
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④
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2B
【单选题】
下图中1/4球体俯视图正确的是<img src="https://file.icve.com.cn/ssykt/458/886/729DDB91BAE02987A455898A5C24B400.png"/>
①
<img src="https://file.icve.com.cn/ssykt/28/959/070EFCA41887247CCBA77F12D2235909.png">
②
<img src="https://file.icve.com.cn/ssykt/807/795/C9EC6C112F956260C2CD142C3DE7C054.png">
③
<img src="https://file.icve.com.cn/ssykt/590/288/93B4823E65EB8596CC7ED9DB600108E8.png">
④
<img src="https://file.icve.com.cn/ssykt/61/538/0F58686DF23035C6EBC34B4932843314.png">