1.1 Database search
We searched PubMed and Embase library to identify the works of
literature reporting the relationship between BW and the risk of any
adult-onset cancers published before March 2021. The following keywords
were used for retrieval: (“Birth weight” OR “Birth size”) AND
(“Cancer” OR “tumor” OR “brain cancer” OR “breast cancer” OR
“bladder cancer” OR “colorectal cancer” OR “endometrial cancer” OR
“esophageal cancer” OR “kidney cancer” OR “lung cancer” OR
“leukemia” OR “lymphoma” OR “liver cancer” OR “nervous system
tumors” OR “malignant melanoma” OR “osteosarcoma” OR “ovarian
cancer” OR “prostate cancer” OR “testicular cancer”). The detailed
search strategy was shown in Table S1. Then we add studies included in
systematic reviews and meta-analyses and duplicate articles were
excluded.