Integrated analysis of comorbidity, pregnant outcomes, and amniotic fluid cytogenetics of fetuses with persistent left superior vena cava

Table 1 Clinical characteristics in the isolated persistent left superior vena cava group and the persistent left superior vena cava with other malformations group, n (%)

	Isolated PLSVC (n = 49)	PLSVC with other malformations (n = 48)	χ2	P value
Age
< 35 years old	42 (85.7)	39 (81.3)	0.35	0.55
≥ 35 years old	7 (14.3)	9 (18.7)
Number of fetuses
Singleton	43 (87.8)	44 (91.7)	0.40	0.53
Twins	6 (12.2)	4 (8.3)
Gestational age at initial diagnosis
Before 28 wk	46 (93.9)	45 (93.8)	0.001	0.97
After 28 wk	3 (6.1)	3 (6.2)
Pregnancy outcome
Persistent pregnancy	48 (98.0)	36 (75.0)	11.01	0.001
Terminated pregnancy	1 (2.0)	12 (25.0)
Amniocentesis status
No apparent abnormalities	5 (10.2)	14 (29.2)	15.33	< 0.001
Abnormal results	0 (0.0)	7 (14.6)
No amniocentesis performed	44 (89.8)	27 (56.2)

PLSVC: Persistent left superior vena cava.