Table 1.

Cohort characteristics by menopausal status, the EPIC study

CountryPremenopausal
Postmenopausal
Cohort size (n)Age, baseline median (range)Person-yearsNo. cases*Cohort size (n)Age, baseline median (range)Person-yearsNo. cases*
France12,42946 (42-58)104,96826628,82958 (43-71)238,066773
Italy10,87943 (29-58)67,53415612,58057 (39-78)75,986209
Spain13,10042 (29-57)86,1921067,88858 (40-70)51,70886
United Kingdom25,58236 (20-58)138,86513518,37161 (39-80)99,134289
The Netherlands8,60338 (20-58)46,2387512,70159 (39-70)92,636273
Greece5,38440 (20-57)20,155117,65663 (40-80)28,42426
Germany12,00640 (20-58)69,1826910,49958 (39-70)61,412163
Sweden9,63561 (45-74)73,455232
Denmark2,07752 (50-58)13,6705119,95058 (50-66)133,304503
Total90,06042 (20-58)546,807869128,10959 (39-80)854,1272,554
  • * Invasive (malignant, primary) breast cancer.

  • The United Kingdom cohort consists of participants recruited from both the general population (n = 12,984) and health-conscious individuals (i.e., vegetarians and healthy eaters; n = 30,969).

  • Sweden: data presented are based on the Malmö cohort; data on premenopausal women not available.