Absence of multiplicative interactions between occupational lung carcinogens and tobacco smoking: a systematic review involving asbestos, crystalline silica and diesel engine exhaust emissions

Table 1 Description of cohort studies included in the systematic review for the asbestos-smoking interaction

Author (Year)	Study design	Geographic area	Industry type	Fiber type	Outcome identification	Asbestos				Smoking			NOS
Author (Year)	Study design	Geographic area	Industry type	Fiber type	Outcome identification	Data collection	Exposure Identification	Non exposed	Exposed	Data collection	Non Smoker	Smoker	NOS
Berry (1985) [24]	Prospective	East London (UK)	Asbestos factory	Undetermined	Register	Employment record	Expert	Light and moderate	Severe	Questionnaire	Never	Ever	6
Liddell (2002) [26]	Prospective	Quebec (Canada)	Mining and Milling	Chrysotile	Death certificate	Employment record	Measures	<30 mpcf.y	≥30 mpcf.y	Questionnaire	Never	Ever	7
Reid (2006) [23]	Prospective	Wittenoom (Australia)	Mining and Milling	Crocidolite	Register	-Questionnaire -Employment record	Measures	Low	High	Questionnaire	Never and former >20 Y	Current and former <20 Y	8
Frost (2011) [25]	Prospective	Great Britain	Different types	Undetermined	Register	Questionnaire	Expert	<10 Y	≥30 Y	Questionnaire	Never	Current	8
Wang (2012) [22]	Prospective	Qinghai (China)	Mining and Milling	Chrysotile	Death certificate	Employment record	Measures	Non miners and millers	Miners and millers	Interview	Never	Ever	6
Wang (2012) [28]	Prospective	China	Asbestos factory	Chrysotile	Death certificate	-Employment record -Questionnaire	Measures	Electronics factory	Asbestos cohort	Questionnaire	Never	Ever	7
Offermans (2014) [27]	Case-cohort	Netherlands	Undetermined	Undetermined	Register	Questionnaire	Matrix	Never	Ever	Questionnaire	Never	Current	7

NOS the Newcastle-Ottawa quality assessment Scale, S current smokers, mpcf.y million particles per cubic foot x years, Y years

ISSN: 1471-2458