Findings

What do systematic reviews say?

2 questions · 2 findings · 1 reviews

No studies found 0 · 0%GRADE not reported 0 · 0%Very low 0 · 0%Low 1 · 50%Moderate 0 · 0%High 1 · 50%

Overall breast cancer incidence · women with above‐average risk of developing breast cancer

Aromatase inhibitors leads to lower overall breast cancer incidence compared with placebo (high certainty).

1 finding from 1 review

Risk‐reducing medications for primary breast cancer: a network meta‐analysis 2019 · Cochrane Headline outcomes only
RR 0.47 [0.35, 0.63]
2 studies · 8424 participants
High

Overall breast cancer incidence · women with above‐average risk of developing breast cancer

Aromatase inhibitors may leads to lower overall breast cancer incidence compared with tamoxifen (indirect comparison)a (low certainty).

1 finding from 1 review

Risk‐reducing medications for primary breast cancer: a network meta‐analysis 2019 · Cochrane Headline outcomes only
RR 0.67 [0.46, 0.98]
5 studies · 31256 participants
Low