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Table 2 Risk of pancreatic cancer in association with aspirin use – Roswell Park Cancer Institute, Buffalo, NY 1982–1996.

From: Regular use of aspirin and pancreatic cancer risk

 

Cases n (%)

Controls n (%)

Crude OR (95% CI)

Adjusted OR1 (95% CI)

All

Non-Regular User

108(55.7)

327(56.2)

1.00

1.00

Regular User2

86 (44.3)

255(43.8)

1.02 (0.74, 1.42)

1.00 (0.72, 1.39)

Dosage Used

    

   1–6 tabs/wk3

61 (31.4)

157(26.9)

1.18 (0.82, 1.70)

1.15 (0.79, 1.67)

   7+ tabs/wk3

25 (12.9)

98 (16.8)

0.87 (0.51, 1.48)

0.85 (0.49, 1.45)

Duration of Use

    

   0.5–10 years3

37 (19.1)

137(23.6)

0.82 (0.54, 1.25)

0.82 (0.54, 1.26)

   11+ years3

49 (25.3)

117(20.1)

1.27 (0.85, 1.89)

1.21 (0.81, 1.82)

Tablet-years of Use3

    

   1–10 tablet years

69 (35.6)

176 (30.2)

1.19 (0.83, 1.69)

1.15 (0.80, 1.65)

   11+ tablet years

17 (8.8)

79 (13.6)

0.65 (0.37, 1.15)

0.65 (0.37, 1.16)

Men

Non-Regular User

58 (54.7)

174 (54.7)

1.00

1.00

Regular User2

48 (45.3)

144 (45.2)

1.00 (0.64, 1.56)

0.99 (0.64, 1.5)

Dosage Used3

    

   1–6 tabs/wk

31 (29.2)

87 (27.4)

1.07 (0.64, 1.77)

1.05 (0.63, 1.75)

   7+ tabs/wk

17 (16.0)

57 (17.9)

0.90 (0.48, 1.66)

0.91 (0.49, 1.70)

Duration of Use3

    

   0.5–10 years

27 (25.5)

81 (25.5)

1.00 (0.59, 1.69)

1.03 (0.60, 1.75)

   11+ years

21 (19.8)

63 (19.8)

1.00 (0.56, 1.78)

0.95 (0.53, 1.72)

Tablet-years of Use3

    

   1–10 tablet years

43 (40.6)

113 (35.5)

1.14 (0.72, 1.81)

1.12 (0.70, 1.78)

   11+ tablet years

5 (4.7)

31 (9.7)

0.48 (0.18, 1.30)

0.52 (0.19, 1.40)

Women

Non-Regular User

50 (56.8)

153 (59.0)

1.00

1.00

Regular User2

38 (43.2)

111 (42.0)

1.05 (0.64, 1.71)

1.01 (0.62, 1.67)

Dosage Used3

    

   1–6 tabs/wk

30 (34.1)

70 (26.5)

1.31 (0.77, 2.24)

1.29 (0.75, 2.23)

   7+ tabs/wk

4 (9.1)

41 (15.5)

0.77 (0.24, 2.40)

0.67 (0.21, 2.14)

Duration of Use3

    

   0.5–10 years

10 (11.4)

56 (21.2)

0.55 (0.26, 1.15)

0.55 (0.26, 1.16)

   11+ years

28 (31.8)

54 (20.5)

1.59 (0.91, 2.77)

1.52 (0.86, 2.69)

Tablet-years of Use3

    

   1–10 tablet years

26 (29.5)

63 (23.9)

1.26 (0.72, 2.21)

1.25 (0.70, 2.20)

   11+ tablet years

12 (13.6)

48 (18.2)

0.77 (0.38, 1.55)

0.72 (0.35, 1.49)

  1. 1. Odds ratio adjusted for age, packyears of smoking and family history of pancreatic cancer. 2. Regular use defined as self-reported use for at least once a week for six consecutive months. 3. Among regular users.