Table 2.

Summary of details of the reviewed publications

Year of publication	First author	Type of screening	Number of participants	Study design	Measure of social status	Other variables
2002	Nakayama et al.	CXR	536 Japan	Case-control study	No	Age, smoking status
2002	Nawa et al.	LDCT	7956 Japan	Cohort study	No	No
2003	Ford et al.	CXR	4705 USA	Randomized controlled trial	Education	Race, age, smoking status
2006	Kamposioras et al.	CXR	1099 Greece	Cross-sectional study	Occupation	Age, smoking status, family history of lung cancer
2007	Blanchon et al.	LDCT CXR	765 France	Randomized controlled trial	No	Age, smoking status
2009	Pegna et al.	LDCT	3206 Italy	Randomized controlled trial	No	No
2010	Aberele et al.	LDCT CXR	53,456 USA	Randomized controlled trial	Education	Race, age, ethnicity, marital status, weight, smoking status
2010	Van der Aalst et al.	LDCT	5161 The Netherlands, Belgium	Randomized controlled trial	Education	Age, marital status
2011	Hestbech et al.	LDCT	4101 Denmark	Cross-sectional study	Education, Occupation	Geographical area, living alone, smoking status, employment status
2011	Kondo et al.	LDCT CXR	378 Japan	Retrospective study	No	No
2011	Wildstein et al.	LDCT	3387 USA	Cohort study	Education	Age, ethnicity, family history
2012	Doria-Rose et al.	LDCT CXR	619 USA	Cross-sectional study	Education, family income	Race, age, insurance status, unemployment, smoking status
2014	McRonald et al.	LDCT	23,794 UK	Randomized controlled trial	Index of multiple deprivation (IMD)	Age, smoking status
2014	Zakrzewska et al.	LDCT	1619 Poland	Cross-sectional study	Income per household	Age