Bmj Usa: Letter

RAPID RESPONSES FROM BMJ.COM: Confounding factors

BMJ 2003; 327 doi: http://dx.doi.org/10.1136/bmjusa.02020003 (Published 19 November 2003) Cite this as: BMJ 2003;327:E93
  1. Richard Hutchinson ([email protected]), medical student
  1. Imperial College, UK
  2. Sociology Department, University of California, Santa Cruz, Santa Cruz, CA 95061

    This article originally appeared in BMJ USA

    Editor—I may only be a second-year medical student, but I've seen enough evidence-based medicine examples over the previous year to be able to spot when I think somebody is jumping to the wrong conclusion when interpreting data.

    Sargent et al found a higher smoking uptake among adolescents who had seen more incidents of smoking in movies during the study period. However, I suggest that this association merely reflects the fact that adolescent smokers socialize a lot in public, due to smoking bans in the home (by parents). The …

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