Table 7. Subgroup analyses stratified by TNM stage for surgical patients (EOCSS).

	Stage I	Stage II	Stage III	Stage IV
Marital status
Married	Ref.	Ref.	Ref.	Ref.
Divorced/separated	1.42(0.92, 2.19)	1.10(0.70, 1.71)	1.16(1.02, 1.33)b	1.15(0.98, 1.35)
Widowed	1.81(1.18, 2.78)a	1.35(0.91, 2.00)	1.07(0.94, 1.24)	1.19(1.01, 1.41)b
Never married	1.38(0.99, 1.92)	1.61(1.16, 2.25)a	1.02(0.90, 1.15)	1.16(0.99, 1.35)
Age
<60	Ref.	Ref.	Ref.	Ref.
60-69	0.76(0.52, 1.12)	1.04(0.74, 1.47)	1.21(1.09, 1.34)a	1.13(0.99, 1.29)
70-79	1.69(1.13, 2.53)b	1.86(1.29, 2.70)a	1.55(1.37, 1.75)a	1.13(0.97, 1.32)
≥80	2.25(1.33, 3.82)a	2.66(1.69, 4.18)a	1.99(1.67, 2.38)a	1.44(1.15, 1.81)a
Race
White	Ref.	Ref.	Ref.	Ref.
Black	1.15(0.69, 1.92)	2.12(1.35, 3.34)a	1.17(0.99, 1.40)	1.11(0.92, 1.34)
Others	0.76(0.50, 1.16)	0.70(0.43, 1.15)	0.98(0.84, 1.15)	0.92(0.76, 1.11)
Diagnosis year
2004-2008	Ref.	Ref.	Ref.	Ref.
2009-2012	0.76(0.57, 1.03)	1.14(0.85, 1.53)	0.92(0.84, 1.01)	0.94(0.84, 1.05)
Grade
I	Ref.	Ref.	Ref.	Ref.
II	1.52(0.92, 2.52)	1.31(0.66, 2.61)	1.41(0.99, 2.00)	1.33(0.80, 2.21)
III	2.29(1.39, 3.77)a	1.93(0.99, 3.76)	1.83(1.31, 2.55)a	1.25(0.77, 2.02)
IV	2.00(1.12, 3.57)b	1.51(0.74, 3.07)	1.70(1.22, 2.39)a	1.27(0.78, 2.07)
Unknown	1.70(1.00, 2.88)	1.92(0.96, 3.83)	1.77(1.26, 2.50)a	1.16(0.71, 1.90)
Histological type
Serous	Ref.	Ref.	Ref.	Ref.
Mucinous	0.93(0.60, 1.45)	1.79(0.99, 3.23)	2.57(1.94, 3.40)a	1.86(1.31, 2.63)a
Clear-cell	1.10(0.77, 1.58)	1.41(0.90, 2.20)	1.54(1.25, 1.91)a	1.41(1.06, 1.88)b
Endometrioid	0.43(0.27, 0.67)a	0.64(0.42, 1.00)b	0.48(0.37, 0.62)a	0.81(0.59, 1.11)
Others	0.68(0.45, 1.03)	1.29(0.93, 1.77)	1.07(0.95, 1.20)	0.95(0.82, 1.09)

a: p <0.01; b: p <0.05.