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Table 3 Previous studies about ovarian preservation in endometrial cancer patients

From: The survival effect of ovary preservation in early stage endometrial cancer: a single institution retrospective analysis

Study Year Country Period Patients Age Stage Grade Histology Follow up period (month) Survival benefits
Wright 2009 USA 1988–2004 402/2867 45 Ia 64%, Ib 33%, Ic 3% I 79%, II 14%, III 3% endo 1–121 NS
Lee 2009 Korea 1993–2005 123/− 45 Ia 74%, Ib 23%, Ic 3% I 70%, II 17%, III 2% Endo (86%) 1–125 No recur,
5-yr OS:98%
Sun 2012 China 2002–2010 34/132 45 Ia 71%, Ib 22%, Ic 7% I 70%, II 20%, III 10% Endo (97%) 27–122 NS
Lee 2013 Korea 1997–2008 176/319   Ia 89% Ib 5% II 6% I 78% II 18% III 4% endo 6–208 NS
Wright 2016 USA 1998–2012 1121/14527 < 50 Ia 89% Ib 8% II 3% I 60% II 27% III 6% endo 61, median NS
Wang 2016 China 2009–2015 25/76 < 45 Ia 87%, Ib 13% I 75%, II 21%, III 40% Endo (99%)   NS
  1. NS non-specific