Table 3

Cohort and occupational studies of the relation between asbestos exposure and smoking jointly and the risk of lung cancer (with internal data for all four comparison groups (group A))

Study (ref)^5-150	Location	Study population	Follow up period	End point	Cases^5-151	Source of diagnosis
McDonald et al 24	Quebec, Canada	Chrysotile miners and millers	1950–92	Mortality	299	Death certificates
Cheng and Kong25	Tianjin, China	Chrysotile asbestos products workers	1972–87	Mortality	21	Not given
Zhu and Wang26	8 factories, China	Chrysotile asbestos products workers	1972–86	Mortality	57	Death certificates, medical records
Berry et al ^5-152 ¹	East London, England	Asbestos factory workers	1960–70, 1971–80	Mortality	79	Death certificates
Acheson et al 27	Uxbridge, England	Amosite asbestos factory workers	1947–79	Mortality	22	Death certificates
Meurman et al 28	North Savo, Finland	Anthophyllite miners	1953–91	Incidence	55	Cancer registration
Hiltet al 29	Telemark, Norway	Workers in nitric acid production plant	1953–80	Mortality	127	Death certificates

↵5-150 First author of most papers on study; reference is to paper from which main results were obtained.
↵5-151 Number of cases with data on smoking and asbestos exposure.
↵5-152 Results were presented for two separate follow up periods; internal data was only available for 1960–70.