Table 1

Descriptive characteristics of study

Cases (n = 194)Controls (n = 208)
Menopausal status
 Premenopausal, n6875
 Postmenopausal, n126133
Age, yr (SD)55 (11)55 (11)
Urban residency, %6161
More education than comprehensive school, %2014
Body mass index, kg/m2 (SD)26.9 (5.0)26.2 (4.3)
Waist:hip ratio (SD)0.83 (0.05)0.83 (0.04)
Age at menarche, <12 yr, %2523
Age at first full-term pregnancy, %
 Nulliparous1913
 <25 years4950
 >30 years1210
First-degree family history, %96
History of benign breast disease, %4542
Oral contraceptive use, %4249
Hormonal replacement therapy, %1316
Abstainers of alcohol, %5145
Current smokers, %1411
Leisure activity >3 times/week4248
Diet
 Energy intake, kcal (SD)1888 (532)1821 (551)
 Fat intake, % of energy (SD)33.1 (4.8)34.0 (5.2)
 Intake of dietary fiber, g (SD)22.8 (8.1)22.1 (7.9)
Mean serum enterolactone, nmol/l19.6 (17.0)25.9 (21.9)
 Premenopausal women16.6 (13.2)20.7 (16.0)
 Postmenopausal women21.2 (18.6)28.9 (24.2)