Do You Have A Landline Phone?

If not, and you do have a cellphone, then you are more likely to be "younger, binge drinkers, smokers and without health insurance." According to this article [BugMeNot to avoid registration] says 11.8% of [presumably American] adults live in households that use only cellphones. Health researchers, who conduct surveys by phone, say that by excluding these users from surveys is distorting their results. Federal law prohibits including cellphones in automated dialing lists, so they have to be dialed manually.

The article does not address whether excluding those people who wisely refuse to answer phone surveys (landline or cell) also distorts their findings.