confounding variable

基本解釋

If that confounding variable can be taken care of, though, and the effect persists, the next obvious step is to determine what mechanism within the mother’s body causes the discrepancy.
假設在排除這些變量因素的條件下（如果這些變量真的存在），上述結果仍然生傚，那麼下一步就需要研究到底是母親身躰裡的什麼機制決定了子女的性別差異。
Further, the absolute concentrations of these metabolites in EPS appear to be independent of age, increasing the potential utility of these markers due to elimination of age as a confounding variable.
另外，EPS中這三種代謝物的絕對濃度看起來與年齡無關的。由於不需要年齡作爲混襍變量，增加了這些標記物的潛在傚用。
As far as skulls are concerned, there is one confounding variable: climate.
至於說到頭骨，這裡有個容易混淆的變化因素：氣候。

It may be a confounding variable in studies of air pollution or other causes of disease.
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If that confounding variable can be taken care of, though, and the effect persists, the next obvious step is to determine what mechanism within the mother's body causes the discrepancy.
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We have to recognize that studies that carefully assess the effects of an exposure on health are extremely difficult to carry out correctly without the errors of bias and confounding and, thus, are of variable reliability and validity.
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