Study	Reason for exclusion
Arts 2001	No distinction between green and black tea
Bianchi 2000	No distinction between green and black tea
Chyou 1995	No green tea
Hara 1984	All cancer patients
Hoshiyama 1992	No distinction between at least 2 amounts of frequency of green tea
Il'yasova 2003	No distinction between green and black tea
Imai 1997	This paper is summarised and contains added new data in the Nakachi et al 2000 paper
Inoue 1997	All cancer patients
Inoue 2001	Study does not address cancer
Ishizuka 2003	Measured gallstones
Jatoi 2003	All cancer patients
Kono 1991	Measured polyps of the colon
Kuwahara 2000	Measured atrophic gastritis
Lee 1990	Mixed reporting of results for oolong, black and green tea No distinction between at least 2 amounts of frequency of green tea consumption
Montella 2007	No distinction between green and black tea
Montella 2009	No distinction between green and black tea
Nagano 2000	Summarised and added new data in Nagano et al 2001
Nakachi 1998	All cancer patients
Nakachi 2003	Paper reviews Nakachi et al's 1998 study, all cancer patients
Oguni 1992	Abstract only, insufficient data
Ohno 1985	No amount of frequency of green tea consumption specified
Ohno 1995	"Okinawa tea" consumption, which is half‐fermented oolong tea
Pisters 2001	All cancer patients
Ren 1991	Type of tea not specified
Shibata 2000	Measured atrophic gastritis
Shim 1995	Study does not address cancer
Sun 2002	No distinction between green and black tea No distinction between at least 2 amounts of frequency of green tea consumption
Tewes 1990	Amount of frequency of green tea consumption not specified
Tsubono 1997	Not related to cancer risk factors
Wakai 1993	All cancer patients
Wang 2002	No cancer (precancerous lesions)
Wu 2003a	Amount of frequency of green tea consumption not specified
Yu 1991	Amount of frequency of green tea consumption not specified, not green tea only
Zhang 2004	Follow‐up study to Zhang 2002, all cancer patients
Zhang 2006	Results did not differentiate between black and green tea drinkers