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Evidence found and GRADE certainty

42 questions · 42 findings · 3 reviews · Gynaecological, Neuro-oncology and Orphan Cancer

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 22 · 52.4%Low 12 · 28.6%Moderate 2 · 4.8%High 6 · 14.3%

Highest vs lowest selenium exposure

Prostate cancer risk (13 studies) · Participants in trials with low risk of bias

Highest showed no clear difference in prostate cancer risk No. of participants: 18,942 (4 RCTs) compared with lowest selenium exposure (high certainty).

1 finding from 1 review

Highest vs lowest selenium exposure

Any cancer risk No. of participants: 76,239 (7 observational studies) · Participants in non experimental cohort studies on selenium and cancer

It is very uncertain whether highest changes any cancer risk No. of participants: 76,239 (7 observational studies) compared with lowest selenium exposure (very low certainty).

1 finding from 1 review