Research Article

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

Table 2

Diagnosis of breast cancer— 𝑛 (%).

35 (%)36–40 (%)41–45 (%)46–50(%)Total (%)

Self-breast examination56 (80.0)92 (66.7)151 (56.3)194 (49.6)493 (56.9)
Periodical screening3 (4.3)9 (66.7)63 (23.5)93 (23.8)168 (19.4)
Occasional finding11 (15.7)37 (26.8)53 (19.8)101 (25.8)202 (23.3)
Other4
Missing145

𝜒 2 = 4 5 . 5 3 ; 𝑃 < . 0 0 1 .