A Note on “A Catalog of Biases in Questionnaires” [Response to Letter]

A Note on " A Catalog of Biases in Questionnaires " [Response to Letter] LETTER TO THE EDITOR Suggested citation for this article: Choi BCK, Pak AWP. A note on " A Catalog of Biases in Questionnaires " [response to letter]. Prev Chronic Dis [serial online] 2005 Apr [date cited]. In Reply: We would like to thank Dr Harrow (1) for pointing out a flawed example in our paper (2). As he notes, the recommended question should be: How many cigarettes do you smoke per day? [ ] None [ ] 1–4 [ ] 5–24 [ ] 25 or more The previously recommended category " 4 or less " was a typographical error. References 1. Harrow JJ. A note on " A Catalog of Biases in Questionnaires " [letter to editor]. or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.