Smoking classification

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Case #1

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:

Overview

Smoking may be classified as heavy and non-heavy, depending on the number of cigarettes consumed per day.

Classification

Smoking may be classified based on the number of cigarettes per day multiplied by the duration of smoking as years (pack per year) to:

• Heavy smokers: More than 20 packs per year (p/y)
• Non-heavy smokers: Less than 20 p/y