Table 5.

Results from the ordinal logistic regression model for BI-RADS. The model was stratified based on the FFTP results from the GLAND and VBD models: “≤25.7 years” and “>25.7 years.”

	For an FFTP ≤ 25.7 years (n = 504)				For an FFTP > 25.7 years (n = 530)
Variable	OR	95% CI LL	95% CI UL	P value	OR	95% CI LL	95% CI UL	P value
FFTP, +1 year	0.97	0.89	1.06	0.53	1.05	1.00	1.11	0.059
Age at MBD measurement, +1 year	0.97	0.94	1.00	0.97	0.96	0.93	0.99	0.004
Age at menarche, +1 year	1.19	1.05	1.34	0.0048	1.08	0.96	1.22	0.19
Use of a contraceptive pill, yes compared with no	1.20	0.69	2.09	0.52	1.93	0.96	3.87	0.066
Use of hormones during menopause, yes compared with no	0.99	0.66	1.51	0.98	0.63	0.40	0.98	0.0415
Current BMI (kg/m2)
Underweight and normal	Referent
Overweight	0.17	0.11	0.25	0.26	0.20	0.14	0.30	0.87
Obese	0.04	0.02	0.07	<0.0001	0.04	0.02	0.07	<0.0001
Number of live-born children
1 child	Referent
2 children	0.93	0.59	1.47	0.45	0.84	0.54	1.32	0.66
3 or more children	0.66	0.41	1.05	0.11	0.61	0.39	0.95	0.0192

Data are presented as OR estimates and 95% Wald CIs.

The multivariate PLR model was adjusted for a priori chosen variables: age at menarche, ever use of OC, ever use of HRT, age at screening, number of live-born children, and current BMI.

Abbreviations: LL, lower limit; UL, upper limit.