Table 1. The search strategy summary.

Items	Specification
Date of search	August 1st, 2022
Databases and other sources searched	PubMed
Search terms used	(“green tea” or polyphenol or “Epigallocatechin-3-gallate” or egcg or “epigallocatechin gallate”[nm] or “Catechin”[nm]) and (“lung cancer” or “Lung Neoplasms”[mesh])
Timeframe	From January 1st, 1980 to August 1st, 2022
Inclusion and exclusion criteria	Clinical trials, observational studies, animal studies and basic researches were included. Only articles published in English were included
Selection process	Three authors selected studies together