Factual Wynder & Graham 1950 | Fictional smoking distribution | ||||
---|---|---|---|---|---|
Individual | Cigarettesa | Classification | Cigarettesa | Mis-classification | |
Cumulative | At work | Off work | |||
A | <1 | Nonsmoker | – | <1 | – |
B | 1–9 | Light smoker | 0 | 1–9 | Nonsmoker |
C | 10–15 | Moderately heavy smoker | 5 | 10 | Light smoker |
D | 16–20 | Heavy smoker | 0 | 16–20 | Nonsmoker |
E | 21–34 | Excessive smoker | 5 | 16–29 | Light smoker |
F | ≥35 | Chain smoker | 10 | ≥25 | Moderately heavy smoker |