When analysis excluded those who did not take any opioids a negative association was found for increased opioid use before first cancer diagnosis among male cases compared to male controls which did not have a history of cancer, there was no such association seen among women in this study.
Neikvætt samband fannst milli aukinnar notkunar á ópíóíð lyfjum fyrir greiningu á fyrsta krabbameini meðal karlkyns tilfella í samanburði við viðmið sem voru án sögu um krabbamein, slíkt samband var ekki að sjá meðal kvenna.