Table 4

Odds Ratios (OR) and 95% confidence intervals (CI) for pancreatic cancer (PanCA) associated with cigarette smoking cessation in relation to frequency of use compared with nonsmokers, San Francisco Bay Area, California.

Years since quittinga

Lifetime Cigarette Frequency of Usec

<10

>=10

OR (95% CI)b

OR (95% CI)b


<40 years smoked

1.3 (0.81 - 2.2)

1.0 (0.76 - 1.3)

>=40 years smoked

1.8 (1.1 - 2.9)

0.99 (0.56 - 1.7)

Test for Homogeneityd (p-value)

0.29

<20 cigarettes/day

1.8 (1.2 - 2.8)

0.96 (0.71 - 1.3)

>= 20 cigarettes/day

1.3 (0.75 - 2.2)

1.0 (0.73 - 1.5)

Test for Homogeneityd (p-value)

0.26

<40 packyears

1.8 (1.1 - 2.8)

0.96 (0.73 - 1.3)

>= 40 packyears

1.4 (0.83 - 2.3)

1.2 (0.74 - 1.8)

Test for Homogeneityd (p-value)

0.45


a The number of participants may vary because of missing data

b Compared with nonsmokers. Adjusted for: age, education, race, ethnicity, diabetes, pancreatitis, gallbladder disease, alcohol intake and body mass index

c Includes smokers who quit ≥1 year prior to diagnosis/interview

d Breslow-Day test

Tranah et al. BMC Cancer 2011 11:138   doi:10.1186/1471-2407-11-138

Open Data