Table 2 Characteristics of included studies
Author | Year | study type | Events | Country | Age | NOS | Tumor site | Types of Tea |
|---|---|---|---|---|---|---|---|---|
James R | 2015 | Case–control study | 3672 | America | 40–85 | 5 | colon, rectum | Any tea |
Vincent K. Dik | 2013 | Prospective cohort study | 477,071 | French | 64.7 ± 8.3 | 7 | colon, rectum | Any tea |
C Dominianni | 2013 | Prospective cohort study | 53,542 | UK | NA | 7 | colon, rectum | Green tea |
Chadwick John Green | 2014 | Case–control study | 1802 | Australia | 40–79 | 4 | colon, rectum | Any tea |
Terryl J. Hartman | 2015 | Randomized controlled trials | 27,108 | French | 50–69 | 6 | colon, rectum | Any tea |
L.K. Heilbrun | 1986 | Prospective cohort study | 7938 | UK | 45–68 | 5 | colon, rectum | Black tea |
Xinyi L | 2019 | Prospective cohort study | 455,981 | Chinese | 30–79 | 7 | colon, rectum | Any tea |
Sarah Nechuta | 2012 | Prospective cohort study | 68,522 | Chinese | 40–70 | 7 | colon, rectum | Green tea |
Rashmi Sinha | 2012 | Prospective cohort study | 343,975 | America | 50–71 | 8 | colon, rectum | Any tea |
L Joseph Su cohort1 | 2002 | Prospective cohort study | 12,335 | America | 25–74 | 5 | colon | Green tea |
L Joseph Su cohort2 | 2002 | Prospective cohort study | 12,335 | America | 25–74 | 5 | colon | Green tea |
Can-Lan Sun | 2007 | Prospective cohort study | 546,563 | Singapore | 45–74 | 6 | colon, rectum | Green tea, Black tea |
Alessandra Tavana | 1997 | Case–control study | 10,569 | Italy | 19–79 | 4 | colon, rectum | Any tea |
Gong Yang | 2007 | Prospective cohort study | 397,841 | Chinese | 40–70 | 7 | colon, rectum | Green tea |
Gong Yang | 2011 | Prospective cohort study | 273,776 | Chinese | 40–74 | 7 | colon, rectum | Green tea |