Table 4. Univariate analysis of pregnancy characteristics between the FGR group and non-FGR group.

Pregnancy characteristics	Groups		χ2	P value
	Non-FGR (n=350), n (%)	FGR (n=90), n (%)
Preeclampsia			33.318	<0.001*
No	342 (98.57)	74 (82.22)
Yes	8 (1.43)	16 (17.78)
Gestational hypertension			10.001	0.002**
No	339 (96.86)	80 (88.89)
Yes	11 (3.14)	10 (11.11)
Intrahepatic cholestasis of pregnancy			2.393	0.12
No	339 (96.86)	84 (93.33)
Yes	11 (3.14)	6 (0.67)
Hyperlipidemia			8.325	0.004**
No	333 (95.14)	88 (97.78)
Yes	17 (4.86)	2 (0.22)
Fetal distress			11.752	0.001**
No	318 (90.86)	70 (77.78)
Yes	32 (9.14)	20 (22.22)
Premature delivery			53.580	<0.001*
No	328 (93.71)	59 (65.56)
Yes	22 (6.29)	31 (34.44)
GDM			<0.001	0.99
No	307 (87.71)	79 (87.78)
Yes	43 (12.29)	11 (12.22)
Hypothyroidism			0.267	0.61
No	321 (91.71)	81 (90)
Yes	29 (8.29)	9 (10)
Anemia			2.366	0.12
No	265 (75.71)	75 (83.33)
Yes	85 (24.29)	15 (16.67)
Thrombocytopenia			0.665	0.42
No	338 (96.57)	89 (98.89)
Yes	12 (3.43)	1 (1.11)
Uterine inertia			1.755	0.19
No	339 (96.86)	90 (100)
Yes	11 (3.14)	0 (0)
Placenta previa			2.713	0.10
No	348 (99.43)	87 (96.67)
Yes	2 (0.57)	3 (3.33)
Polyhydramnios			<0.001	>0.99
No	348 (99.43)	90 (100)
Yes	2 (0.57)	0 (0)
Oligohydramnios			37.112	<0.001*
No	333 (95.14)	67 (74.44)
Yes	17 (4.86)	23 (25.56)
Low birth weight			65.782	<0.001*
No	346 (98.86)	69 (76.67)
Yes	4 (1.14)	21 (23.33)
Placental abruption			0.027	0.87
No	347 (99.14)	90 (100)
Yes	53 (0.86)	0 (0)

*, P<0.001; **, P<0.05. FGR, fetal growth restriction; GDM, gestational diabetes mellitus.