RAPID RESPONSES FROM BMJ.COM: Confounding factorsBMJ 2003; 327 doi: https://doi.org/10.1136/bmjusa.02020003 (Published 19 November 2003) Cite this as: BMJ 2003;327:E93
- Richard Hutchinson (firstname.lastname@example.org), medical student
- Imperial College, UK
- 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 …