Table 15 Summary of the main features of the epidemiological studies of cigarette mentholation and lung cancer

Study design

Cases in mentholated cigarette smokers

Prospective cohort

2 (25.0)

50-124

4 (50.0)

Hospital case-control

3 (37.5)

125+

4 (50.0)

Population case-control

3 (37.5)

Controls matched on age and gender

Country

Yes

5 (62.5)

USA

7 (87.5)

No

1 (12.5)

Germany

1 (12.5)

Prospective

2 (25.0)

First year of study

Menthol dose-response studied

1979 to 1985

3 (37.5)

Yes

4 (50.0)

1986 to 1995

4 (50.0)

No

4 (50.0)

Not known

1 (12.5)

Race accounted for

Year of publication

Yes

8 (100.0)

1991 to 2000

3 (37.5)

2001 to 2008

5 (62.5)

Smoking adjusted for

Yes

8 (100.0)

Genders studied

Both

8 (100.0)

Age adjusted for

Yes

8 (100.0)

Smoking groups used in analysis

Current

4 (50.0)

Results by histological type

Yes

1 (12.5)

Ever

4 (50.0)

No

7 (87.5)

Cases studied

200-499

4 (50.0)

NOS study quality score

7 to 9

3 (37.5)

500-999

1 (12.5)

5 to 6

5 (62.5)

1000+

3 (37.5)