(See: Dutra LM, Glantz SA. Electronic cigarettes and conventional cigarette use: a cross-sectional study. Published online March 6, 2014. JAMA Pediatr. doi:10.1001/jamapediatrics.2013.5488.)

One possible answer appears in Wride's column. She writes:

Falk et al., in a of the risk for laryngeal cancer, found that: "Higher risks were associated with smoking nonfiltered than filtered cigarettes." For those who smoked filtered cigarettes, the OR was 5.9 (95% CI = 2.4-14.4); for those who smoked non-filtered cigarettes, the OR was 9.0 (95% CI = 3.2-25.1).

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