Table 2: Patient's clinical and pathological characteristics according to MRP1 and MRP4 expression as assessed by immunohistochemistry.

Clinical parameters
Total
( )
MRP1 expression MRP4 expression
Negative ( )Positive ( )Missing ( ) Negative ( )Positive ( )Missing ( )
%%%%

Age, years 0.245 0.971
 ≤55 4075 1325 23377 1023 12
 >55 4466 2334 54777 1423 11
Tumor histotype0.617 0.686
 Serous 5368 2532 55274 1826 13
 Undifferentiated 982 218 1787 113 4
 Clear cell 867 433 1083 217
 Endometrioid 867 433 667 333 3
 Mucinous 5100 13100 3
 Others 150 150 2100
Tumor stage (FIGO)0.178 0.172
 I + II 3079 821 13083 617 3
 III 4069 1831 63678 1022 18
 IV 1357 1043 1362 838 2
 Missing11
Tumor grade0.0370.821
 1 778 222 583 117 3
 2 3780 920 23274 1126 5
 3 2755 2245 43174 1159 11
 Undifferentiated 9 82 218 1787 113 4
 Missing415
Amount of residual disease0.32 0.29
 NED 3375 1125 33182 718 9
 <1 cm 1267 633 11062 638 3
 >1 cm 2760 1840 12670 1130 9
 Missing1212132

NED: not evidence of disease. values: evaluated on MRP1 and MRP4 expression and available clinical and pathological parameters.