Table 1 Relative risks for adenocarcinomas of the oesophagus (OAC), gastro-oesophageal junction (GOJAC) and squamous cell carcinoma (OSCC) associated with type 2 diabetes; minimally, partially and fully adjusted for confounding factors

From: Does type 2 diabetes influence the risk of oesophageal adenocarcinoma?

History of type 2 diabetes

Control ( N)

Case ( N)

OR (95% CI) a

OR (95% CI) b

OR (95% CI) c

OAC

 No diabetes

1423

293

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes

103

46

1.78 (1.22–2.62)

1.59 (1.04–2.43)

1.32 (0.85–2.05)

 No diabetes

1423

293

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes duration <10 years

68

25

1.46 (0.90–2.38)

1.39 (0.82–2.36)

1.14 (0.66–1.97)

 Diabetes duration 10 years)

30

18

2.45 (1.32–4.57)

1.96 (0.97–3.97)

1.65 (0.80–3.40)

P-trend

    

0.18

GOJAC

 No diabetes

1423

338

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes

103

44

1.56 (1.06–2.28)

1.44 (0.96–2.16)

1.23 (0.82–1.87)

 No diabetes

1423

338

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes (duration <10 years)

68

20

1.06 (0.63–1.79)

0.90 (0.57–1.71)

0.87 (0.50–1.51)

 Diabetes (duration 10 years)

30

22

2.76 (1.55–4.91)

2.46 (1.33–4.55)

2.16 (1.16–4.04)

P-trend

    

0.07

OSCC

 No diabetes

1423

270

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes

103

12

0.54 (0.29–1.0)

0.48 (0.25–0.91)

0.57 (0.30–1.10)

 No diabetes

1423

270

1.0 (ref)

1.0 (ref)

1.0 (ref)

 Diabetes (duration <10 years)

68

7

0.49 (0.22–1.08)

0.42 (0.18–0.97)

0.52 (0.23–1.20)

 Diabetes (duration 10 years)

30

5

0.73 (0.28–1.92)

0.62 (0.23–1.67)

0.70 (0.25–1.93)

P-trend

    

0.17

  1. CI=confidence interval; OR=odds ratio.
  2. aOR: Model 1: adjusted for age (in years) and sex.
  3. bOR: Model 2: adjusted for age (in years), education level, cumulative smoking history, frequency of gastro-oesophageal reflux symptoms 10 years before diagnosis and frequency of aspirin use in the last 5 years.
  4. cOR: Model 3: as for Model 2 with an additional term for BMI.