Table 26 Current cigar smoking and chronic obstructive pulmonary disease (COPD) by inhalation level and cigars per day

Shanks1998

CPS-I

1 to 2

1.39

(0.74 2.38)

IRR

Primary

Shanks1998

CPS-I

3 to 4

1.78

(0.89 3.18)

IRR

Primary

Shanks1998

CPS-I

5+

1.03

(0.37 2.23)

IRR

Primary

Shanks1998

CPS-I

1 to 2

2.64

(1.06 5.44)

IRR

Secondary

Shanks1998

CPS-I

3 to 4

4.33

(2.07 7.97)

IRR

Secondary

Shanks1998

CPS-I

5+

6.68

(3.82 10.85)

IRR

Secondary

Shanks1998

CPS-I

None

1.09

(0.66 1.70)

IRR

Primary

Shanks1998

CPS-I

Slight

2.05

(0.66 4.77)

IRR

Primary

Shanks1998

CPS-I

Moderate-deep

4.52

(0.91 13.22)

IRR

Primary

Shanks1998

CPS-I

None

3.36

(1.96 5.39)

IRR

Secondary

Shanks1998

CPS-I

Slight

7.68

(3.31 15.14)

IRR

Secondary

Shanks1998

CPS-I

Moderate-deep

5.84

(2.34 12.02)

IRR

Secondary