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Note that the CADR is reported for the PAC running on its highest fan setting

However, this only makes sense if we follow the various stages, and in doing so discover that the procedure is indeed complex

In some areas, human activities such as mining, industrial operations, and historical pesticide use may also contribute to arsenic contamination

To address this, we conducted three additional models for each hangover variable, each controlling for one of three person-level smoking status variables: a binary variable reflecting whether they endorsed ever being a dependent smoker (because we had no measure of nicotine dependence), a binary variable indicating whether they reported smoking daily or almost daily in the past month, and a continuous variable reflecting the mean number of cigarettes smoked over the 8-week period