APOE and polycystic ovary syndrome: However, the isoforms of ApoE-ApoE2, E3, and E4- were not different in PCOS compared with women without PCOS (26,1934 ± 50,357 vs. 259,099 ± 51,595 RFU of ApoE2, p = 0.67, PCOS vs. control; 217,377 ± 67,477 vs. 201,576 ± 61,141 RFU of ApoE3, p = 0.06, PCOS vs. control; 219,789 ± 58305 vs. 210,604 ± 55,689 RFU of ApoE4, p = 0.22, PCOS vs. control).