Table 3 Joint effect of WC status and plasma leptin levels on breast cancer risk

From: Circulating levels of leptin, adiposity and breast cancer risk

Group

WC a (cm)

Leptina (ng ml−1)

No. of cases (%)

No. of controls (%)

OR b (95% CI)

P trend

All women

      
 

80

10.9

153 (51.9)

375 (63.8)

1.00 (reference)

 
 

80

>10.9

45 (15.2)

65 (11.0)

2.00 (1.27–3.17)

 
 

>80

10.9

38 (12.9)

71 (12.1)

1.65 (0.99–2.76)

 
 

>80

>10.9

59 (20.0)

77 (13.1)

2.51 (1.51–4.19)

0.0006

Premenopausal

      
 

80

10.6

110 (64.0)

214 (64.5)

1.00 (reference)

 
 

80

>10.6

25 (14.5)

35 (10.5)

1.90 (0.98–4.02)

 
 

>80

10.6

10 (5.8)

37 (11.1)

1.29 (0.59–2.83)

 
 

>80

>10.6

27 (15.7)

46 (13.9)

1.99 (1.06–3.39)

0.0572

Postmenopausal

      
 

80

11.5

47 (38.2)

149 (58.0)

1.00 (reference)

 
 

80

>11.5

15 (12.2)

30 (11.7)

1.64 (0.77–3.53)

 
 

>80

11.5

27 (22.0)

46 (17.9)

1.85 (0.91–3.75)

 
 

>80

>11.5

34 (27.6)

32 (12.4)

3.25 (1.53–6.91)

0.0029

  1. CI=confidence interval; OR=odds ratio; WC=waist circumference.
  2. aWC status and plasma leptin were categorised by the third tertile value in the control group.
  3. bIn addition to matched variables, odds ratios were also adjusted for body mass index.