自访谈和病历得到有关潜在的致混淆因素。
Information on potential confounding factors was obtained from the interviews and medical charts.
我们使用Cox回归模型来估计罹患癌症的风险并根据潜在的混淆因素进行校正。
We used Cox regression models to estimate the risk of cancer and adjust for potential confounding factors.
然而一个可能的混淆的因素是孩子没有被测试是否在刚学走路时就处在污染环境中。
One possible confounding factor, however, is that the children were not tested for lead exposure when they were toddlers.
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