Table 5 Risk of incident pancreatic cancer by family history of breast or colorectal cancer, stratified by covariates

From: Family history of cancer, Ashkenazi Jewish ancestry, and pancreatic cancer risk

 

Family history of breast cancer

P interaction b

Family history of colorectal cancer

P interaction b

Absent

Present

Absent

Present

Never smoker

  

0.87

  

0.05

 No. of cases

78

20

 

131

37

 

 Person-years

206,719

36,090

 

471,348

69,793

 

 Multivariable HR (95% CI)a

1 (referent)

1.39 (0.84–2.28)

 

1 (referent)

1.56 (1.07–2.26)

 

Ever smoker

 No. of cases

115

24

 

234

39

 

 Person-years

213,983

37,221

 

513,042

77,773

 

 Multivariable HR (95% CI)a

1.10 (0.81–1.50)

1.45 (0.90–2.32)

 

1.35 (1.08–1.68)

1.27 (0.88–1.82)

 

Body mass index < 25 kg/m2

  

0.77

  

0.87

 No. of cases

85

20

 

159

35

 

 Person-years

192,917

34,310

 

450,009

66,556

 

 Multivariable HR (95% CI)a

1 (referent)

1.32 (0.81–2.17)

 

1 (referent)

1.24 (0.86–1.80)

 

Body mass index ≥ 25 kg/m2

 No. of cases

110

26

 

213

45

 

 Person-years

242,735

41,707

 

567,445

85,899

 

 Multivariable HR (95% CI)a

1.00 (0.74–1.34)

1.46 (0.93–2.30)

 

0.98 (0.79–1.22)

1.17 (0.84–1.64)

 

No diabetes

  

0.61

  

0.75

 No. of cases

157

36

 

304

64

 

 Person-years

390,110

68,593

 

938,865

138,689

 

 Multivariable HR (95% CI)a

1 (referent)

1.34 (0.93–1.94)

 

1 (referent)

1.19 (0.90–1.56)

 

Diabetes

 No. of cases

38

10

 

68

16

 

 Person-years

45,661

7445

 

82,229

14,043

 

 Multivariable HR (95% CI)a

1.87 (1.29–2.72)

3.09 (1.60–5.98)

 

1.86 (1.41–2.44)

2.44 (1.45–4.09)

 
  1. CI Confidence interval, HR hazard ratio, MET metabolic equivalent of task
  2. aThe Cox proportional hazards regression models were adjusted for the following covariates except for the stratification variable: age (continuous), race (white, black, other, or unknown), calendar year of questionnaire cycle (continuous), smoking in pack-years (never, 0.1–4.9, 5–19.9, 20–39.9, or ≥40), history of diabetes (yes/no), body mass index (<25, 25–29.9, 30–34.9, or ≥35 kg/m2), physical activity (MET-hours/week in quintiles), alcohol intake (0, 0.1–4.9, 5–14.9, 15–29.9, or ≥30 g/day), and regular multivitamin use (yes/no)
  3. bPinteraction was calculated using the Wald test for the cross-product of cancer family history (yes/no) and a stratification variable