Study Number of PE and CTR Placentas Studied miRNA studied DNA methylation studied Gestational age at delivery(in weeks) Gestational age at delivery(in weeks)
Total PE CTR Mild PE Severe PE EOPET LOPET Early CTR PE Control
Bai [35] 32 15 17           miR-195   37.42 ± 2.57 38.86 ± 1.2
Czikk [26] 59 18           14   DUSP9 30.1 ± 2.2 32.3 ± 2.2
Gao [36] 48   24     10 14       27.9 ± 3.3 EOPET 27.9 ± 3.3 LOPET 28.6 ± 2.5
Hu [24] 50   26   24       miR-16, miR-29b, miR-195, miR-26b, miR-181a, miR-335 and miR-222   37 ± 0.2 38.8 ± 0.4
Li [23] 50 24 26           miR29-b   37 38.8
Muralimanoharan [25] 12 6 6           miR-210   38.1 ± 1.3 38.7 ± 1.1
Xiang [37] 79 48 31             CGI34, LEP, SP1, LP1, CEBPalpha 35.34 ± 3.07 39.38 ± 1.19
Yan [38] 24 12 12           mir-126   35.54 ± 3.77 37.5 ± 1.76
Yuen [39] 22   5     4 4 4 early 5 late   CAPG, GLI2, KRT1, TIMP3 24.86-34 25.86-33.71
Zhu [22] 34   11 8 15       miR-518b, miR-18a, miR-363, miR-542-3p, miR-210, miR-152, miR-411, miR-377   37.6 ± 1.4 37.5 ± 2.2
PE: Preeclampsia; CTR: Control; EOPET: Early Onset Preeclampsia; LOPET: Late Onset Preeclampsia
Table 3: Characteristics of the included studies.