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Table 1 Demographic characteristics of perinatals with CHD and their mothers in Guangdong, China, 2008-2012

From: Prevalence of congenital heart defect in Guangdong province, 2008-2012

Characteristics  
Maternal age, y 28.19 ± 4.92
Education  
Illiterate 29 (0.55%)
1 ~ 6 years 172 (3.26%)
7 ~ 9 years 1771 (33.62%)
10 ~ 12 years 1939 (36.81%)
13 ~ 16 years 1347 (25.57%)
Unknown 10 (0.19%)
Gestational age (week)  
<37 1841 (34.95%)
≥37 3427 (65.05%)
Fetal sex  
Male 2975 (56.47%)
Female 2649 (43.30%)
Unknown 76 (0.23%)
Birth weight (g) 2748.00 ± 795.15
Fetal number  
Singleton 4979 (94.51%)
Twin 303 (5.30%)
Multi-fetal 10 (0.19%)
  1. Data are expressed as mean ± standard deviation or no. (%).