Table 1.

Prevalence of ovarian cancer among treatments

TreatmentTotal hensHens diagnosed with cancer (%)
Control5911 (19)
P+E562 (4)a
P591 (2)b
E5711 (19)
  • aDecreased prevalence compared to control (P < 0.01).

  • bDecreased prevalence compared to control (P < 0.005).