The riddle of shiftwork and disturbed chronobiology: a case study of landmark smoking data demonstrates fallacies of not considering the ubiquity of an exposure

Table 1 Modified from Doll & Hill 1950 (Table V, p. 742) [17]

“Tabel V. – Most recent [number of ciggarettes] consumed regularly by smokers before the onset of present illness”
Disease Group	No. Smoking Daily^a
Disease Group	1 Cig.	5 Cigs.	15 Cigs.	25 Cigs.	50 Cigs.
Males: Lung-carcinoma patients (647)	33	250	196	136	32
Control patients with diseases other than cancer (622)	55	293	190	71	13

^aFor simplicty of calculations, we used the cut-points of Doll’s & Hill’s original table to be the total amount of cigarrettes smoked by these individuals

ISSN: 1745-6673