Table 2 Odds ratios and 95% confidence intervals (95% CI) for a higher Wolfe gradea associated with breast size and BMI at age 53

From: Life-course body size and perimenopausal mammographic parenchymal patterns in the MRC 1946 British birth cohort

 

Univariable analysis

Bivariable analysis b

 

Odds ratio a

95% CI

Odds ratio a

95% CI

Breast size (cm)

 3–6

4.07

2.50, 6.62

2.62

1.54, 4.45

 7–8

1.76

1.31, 2.38

1.45

1.06, 1.99

 9–10

1

 

1

 

 11–12

0.66

0.49, 0.88

0.85

0.63, 1.15

 ≥13

0.40

0.30, 0.54

0.75

0.52, 1.06

   

(Pc<0.001)

 

Fifths of BMI at age 53 (kg m−2)

 <23.1

1

 

1

 

 23.1–25.15

0.67

0.47, 0.97

0.79

0.55, 1.14

 25.16–27.57

0.45

0.32, 0.64

0.57

0.39, 0.82

 27.58–31.39

0.32

0.23, 0.46

0.45

0.31, 0.65

 ≥31.4

0.13

0.09, 0.19

0.21

0.14, 0.32

   

(Pc<0.001)

 
  1. Common odds ratio for three binary outcomes: DY vs P2/P1/N1, DY/P2 vs P1/N1 and DY/P2/P1 vs N1.
  2. Breast size adjusted for fifths of BMI at age 53 years and vice versa.
  3. cP-value for linear trend.
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