One problem was what statisticians call selection bias.
一个问题被统计学家称作选择偏见。
In order to remove some selection bias, he's even hired someone to be (at least some of the time) 'Chief Nag' to get results out of resistant responders.
为了消除一些选择偏见，(至少在一段时间内)他甚至聘请专人担任‘首席挑剔执行官’，以便从存在抵触情绪的反馈者身上得到结果。
Self-selection bias and sampling bias are also discussed at the end of the paper.
与此相关的自选择偏差和抽样偏差问题也在文中进行了讨论。
No baseline data were found to be related to the prognosis due to a small sample size and selection bias.
因小样本及选择偏倚，无基线资料与预后相关。
Before buying a sofa for the office, however, it might be wise to consider the possibility of selection bias.
在办公室添置沙发之前，最好还是先考虑一下选择性偏见的可能性。
Besides, we find no significant self-selection bias in the wage equations, which suggests poor job mobility in our samples.
我们还发现，工资方程并不存在显著的自我选择偏误，这表现出样本中职工的工作流动性还不高。
The researchers acknowledge study limitations, including possible selection bias, misclassification of race and inaccurate responses to questionnaires.
研究人员承认研究也有一定局限性，包括可能的选择偏倚、种族误判和不准确的调查问卷等。
The researchers insist that this lower mortality rate is not the result of the breast augmentation procedure itself, but rather of a double selection bias.
研究人员认为，这一较低的死亡率不是隆胸本身的结果，而是由于双重选择偏倚。
The known correlation of high birth order with low SES suggests that selection bias related to SES may be responsible for the association between birth order and NHL.
低SES与出生次序靠后之间的已知相关性表明SES相关的选择偏差可能影响出生次序和NHL患病风险之间的相关性。
Conclusion The principles and methods for observational studies should be followed to reduce information bias, selection bias and confounding bias in statistical analysis of hospital data.
结论在对医院资料进行统计分析时，应遵循观察性研究的原则和方法，以避免可能存在的信息偏倚、选择偏倚和混杂偏倚。
Conclusion The principles and methods for observational studies should be followed to reduce information bias, selection bias and confounding bias in statistical analysis of hospital data.
结论在对医院资料进行统计分析时，应遵循观察性研究的原则和方法，以避免可能存在的信息偏倚、选择偏倚和混杂偏倚。
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