Table 4

Relationship between exposure of smoking and effect size

Author, year

Unit of exposure

Smoking status

Sex

Exposure

Effect size

P for trend


Ojima, 2007

Pack-years

Current

M

1-9

1.34*

10-19

2.75

20-

5.17

<0.0001

Current

F

1-9

1.31*

10-

5.34

0.0004

Hanioka, 2007

Pack-years

Current

M

1-19

1.99

20-59

2.20

60-

2.94

<0.0001

Current

F

1-19

1.74

20-59

2.30

60-

14.5

<0.0001

Mundt, 2007

Daily consumption

Current

M, F

1-9

2.1

10-19

2.3

20-

3.5

NA

Former

M, F

1-9

1.3*

10-19

1.7

20-

2.4

NA


Dietrich, 2007

Daily consumption

Current

M

1-4

1.4

5-14

1.9

15-24

2.3

25-34

2.7

35-44

2.9

45-

3.0

NA


Trend of the relationship between the level of exposure and effect size was obvious in all studies.

*Not significant

Hanioka et al. BMC Public Health 2011 11:221   doi:10.1186/1471-2458-11-221

Open Data