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Table 1 Clinical characteristics of the pregnant women with congenital heart disease

From: Outcomes of women with congenital heart disease admitted to acute-care hospitals for delivery in Japan: a retrospective cohort study using nationwide Japanese diagnosis procedure combination database

Total N = 249 n (%) or median (inter-quartile range) Number of missing data
Age (years) 32 (28–35) 0 (0.0%)
Height (cm) 157 (153–160) 4 (1.6%)
Weight (kg) 58.2 (52.4–64.4) 2 (0.8%)
Past or current smokers 18 (7.2%) 18 (7.2%)
Ambulance 9 (3.6%) 0 (0.0%)
Emergent hospitalization 25 (10.0%) 0 (0.0%)
Referral from other hospitals 198 (79.5%) 0 (0.0%)
Weeks of gestation
 On admission (weeks) 37 (35–38) 9 (3.6%)
 At delivery (weeks) 37 (36–38) 9 (3.6%)
 < 22 weeks 5 (2.0%)  
 22–37 weeks 70 (28.1%)  
 37 ≤ weeks 165 (66.3%)  
Delivery methods   0 (0.0%)
 Vaginal 68 (27.3%)  
  Vacuum extraction delivery 40 of 68 (58.9%)  
  Forceps delivery 0 of 68 (0.0%)  
 Cesarean section (emergent) 72 (28.9%)  
 Cesarean section (elective) 109 (43.8%)  
Volume of intrapartum hemorrhage (mL) 606 (390–872) 12 (4.8%)
Utilization of intensive care unit 75 (30.1%) 0 (0.0%)
Length of stay (days) 9 (8–17) 0 (0.0%)
Distance between home and hospital (km) 9.8 (5.2–18.0) 78 (31.3%)
Types of hospitals   0 (0.0%)
 University hospitals 137 (55.0%)  
 Other hospitals 112 (45.0%)