Highest showed no clear difference in any cancer risk No. of participants: 19,475 (3 RCTs) compared with lowest selenium exposure (high certainty).
Highest showed no clear difference in cancer mortality risk No. of participants: 17,448 (1 RCT) compared with lowest selenium exposure (high certainty).
Highest showed no clear difference in colorectal cancer risk No. of participants: 19,009 (2 RCTs) compared with lowest selenium exposure (high certainty).
Highest showed no clear difference in non‐melanoma skin cancer risk No. of participants: 2027 (2 RCTs) compared with lowest selenium exposure (moderate certainty).
Highest showed no clear difference in lung cancer risk No. of participants: 19,009 (2 RCTs) compared with lowest selenium exposure (high certainty).
Highest showed no clear difference in breast cancer risk No. of participants: 802 (1 RCT) compared with lowest selenium exposure (moderate certainty).
Highest showed no clear difference in bladder cancer risk No. of participants: 19,009 (2 RCTs) compared with lowest selenium exposure (high certainty).
Highest showed no clear difference in prostate cancer risk No. of participants: 18,942 (4 RCTs) compared with lowest selenium exposure (high certainty).
It is very uncertain whether highest changes stomach cancer risk (18 studies) compared with lowest green tea exposure (very low certainty).
Highest showed no clear difference in liver cancer risk (6 studies) compared with lowest green tea exposure (low certainty).
Highest showed no clear difference in pancreatic cancer risk (9 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower colorectal cancer risk (16 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower colon cancer risk (10 studies) compared with lowest green tea exposure (low certainty).
Highest showed no clear difference in rectal cancer risk (9 studies) compared with lowest green tea exposure (low certainty).
It is very uncertain whether highest changes lung cancer risk (17 studies) compared with lowest green tea exposure (very low certainty).
It is very uncertain whether highest changes breast cancer risk (14 studies) compared with lowest green tea exposure (very low certainty).
Highest may leads to lower gynaecological cancer risk (10 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower endometrial cancer risk (5 studies) compared with lowest green tea exposure (low certainty).
Highest may leads to lower ovarian cancer risk (5 studies) compared with lowest green tea exposure (low certainty).
It is very uncertain whether highest changes prostate cancer risk (13 studies) compared with lowest green tea exposure (very low certainty).