Biological Characteristics and Medical Treatment of Breast Cancer in Young Women—A Featured Population: Results from the NORA Study

Table 1

Age distribution at the time of study entry.

Age (years)	𝑁	%
≤35	78	7.7
35–40	163	16.1
41–45	308	30.4
46–50	463	45.8

Median age: 44.4 (minimum-maximum: 24–50).