Margaret A.WinkerMDIndividualAuthorPhil B.FontanarosaMD, Senior EditorsIndividualAuthor
To the Editor.—In their article, Dr Caraballo and colleagues1 concluded that the higher levels of serum cotinine they observed in black smokers may help explain why black smokers are more likely to experience higher rates of lung cancer than white smokers. They reported that the differences in cotinine levels did not appear to be attributable to differences in environmental tobacco smoke exposure or in number of cigarettes smoked.1 However, Caraballo and colleagues did not consider the possible impact on their data of commonly smoked illegal drugs.
Wiseman EJ. Racial and Ethnic Differences in Serum Cotinine Levels. JAMA. 1998;280(24):2075-2076. doi:10-1001/pubs.JAMA-ISSN-0098-7484-280-24-jbk1223