Re: “Validation of a Method for Reconstructing Historical Rates of Smoking Prevalence”

Authors:

Abstract
In their recent paper, Bilal et al. (1) incorrectly assert that no researchers have assessed the validity of historical smoking prevalence derived from retrospectively reported data. A large body of literature validates this type of data in general (2–4) and smoking data in particular (5–12). In fact, at least 2 previously published studies applied an improved method (8, 9) with better data.

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