Table 16 Current cigar smoking and lung cancer by inhalation level, cigars per day, and duration

Kahn1966

Dorn study

<5

1.14

(0.59, 2.00)

SMR

Kahn1966

Dorn study

5 to 8

2.64

(1.31, 4.74)

SMR

Kahn1966

Dorn study

8+

2.07

(0.20, 7.61)

SMR

Shanks1998

CPS-I

1 to 2

0.9

(0.54, 1.66)

IRR

Primary

Shanks1998

CPS-I

3 to 4

2.36

(1.49, 3.54)

IRR

Primary

Shanks1998

CPS-I

5+

3.4

(2.34, 4.77)

IRR

Primary

Shanks1998

CPS-I

1 to 2

3.18

(1.78, 5.24)

IRR

Secondary

Shanks1998

CPS-I

3 to 4

8.52

(5.87, 11.97)

IRR

Secondary

Shanks1998

CPS-I

5+

7.21

(5.02, 10.03)

IRR

Secondary

Shapiro2000

CPS-II

1 to 2

1.3

(0.70, 2.40)

HR

Primary

Shapiro2000

CPS-II

3+

7.8

(5.90, 10.30)

HR

Primary

Shanks1998

CPS-I

None

1.97

(1.48, 2.57)

IRR

Primary

Shanks1998

CPS-I

Slight

1.89

(0.81, 3.72)

IRR

Primary

Shanks1998

CPS-I

Moderate-deep

4.93

(1.80, 10.72)

IRR

Primary

Shanks1998

CPS-I

None

5.41

(3.93, 7.27)

IRR

Secondary

Shanks1998

CPS-I

Slight

7.63

(4.66, 11.78)

IRR

Secondary

Shanks1998

CPS-I

Moderate-deep

9.77

(5.88, 15.25)

IRR

Secondary

Shapiro2000

CPS-II

No inhalation

3.3

(2.30, 4.70)

HR

Primary

Shapiro2000

CPS-II

Inhalation

11.3

(7.90, 16.10)

HR

Primary

Shapiro2000

CPS-II

<25

2.1

(1.00, 4.20)

HR

Primary

Shapiro2000

CPS-II

25+

5.9

(4.50, 7.70)

HR

Primary