From:  Estradiol exposure and pancreatic cancer risk: convergent evidence from population-based incidence, pharmacovigilance, and tumor biology

 Pharmacovigilance data from the FDA Adverse Event Reporting System.

Adverse eventEstradiolAll other drugs
Pancreatic cancer (DE)923,90923,918
All other adverse events55,59214,025,23314,080,825
∑ (D)55,60114,049,14214,104,743

Rate (DE/D): 0.016%. Chi-squared with Yates’ correction: 76.674. Relative reporting ratio (RRR) and 95% confidence interval (lower bound–upper bound): 0.095 (0.05–0.183); proportional reporting ratio (PRR) and 95% confidence interval (lower bound–upper bound): 0.095 (0.049–0.183); reporting odds ratio (ROR) and 95% confidence interval (lower bound–upper bound): 0.095 (0.049–0.183).