Can yesterday’s smoking research inform today’s shiftwork research? Epistemological consequences for exposures and doses due to circadian disruption at and off work

Table 1 Factual classification of smoking habits in Wynder and Graham, 1950, [22] and fictional misclassification

Factual Wynder & Graham 1950			Fictional smoking distribution
Individual	Cigarettes^a	Classification	Cigarettes^a		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

Note that the fictional smoking distribution does not represent any descriptive statistics regarding smoking at or off work in 1950
^aper day for more than 20 years

ISSN: 1745-6673