Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Forest plot of risk factors in breast cancer in young women. ((A) full-time work (B) education (C) desire to have children (D) with partner (E) depression (F) ≥ 1 child (G) endocrine therapy. Horizontal lines: 95% confidence intervals for study results, Square boxes: Effect quantity for a single study, Diamonds: Merged results, Vertical lines: Invalid line, determining whether the difference in results is statistically significant or not.).
