Table 3 Survival status and survival length by the group of Critical Congenital Heart Defects (month)*

Total

9884

65.1

40.0 (39.5–40.6)

Group 1

4392

53.4

33.4 (32.5–34.2)^a

< 0.001

Group 2

5415

74.5

45.4 (44.7–46.0)^b

Gender

Group 1

Female

1820

54.6

34.1 (32.8–35.4)

0.095

Male

2572

52.6

32.8 (31.7–33.4)

Group 2

Female

2550

73.9

45.1 (44.1–46.0)

0.370

Male

2865

75.0

45.6 (44.7–46.5)

Gestational age

Group 1

< 37 weeks

885

39.0

25.0 (23.1–26.8)

< 0.001

≥ 37 weeks

3447

56.5

35.1 (34.2–36.1)

Group 2

< 37 weeks

1254

64.1

39.3 (37.8–40.8)

< 0.001

≥ 37 weeks

4118

77.6

47.1 (46.4–47.9)

Birthweight by gestational age

Group 1

SGA

1064

44.5

28.5 (26.8–30.2)^a

< 0.001

AGA

3065

55.7

34.5 (33.6–35.5)^b

LGA

203

55.2

32.8 (29.1–36.5^)b

Group 2

SGA

1256

63.6

39.3 (37.8–40.8)^a

< 0.001

AGA

3771

77.7

47.1 (46.4–47.9)^b

LGA

345

78.3

47.2 (44.8–49.7)^b

Number of fetuses in pregnancy

Group 1

Singular

4123

53.4

33.3 (32.4–34.2)

0.007

Twin/triplet

209

44.0

28.2 (24.4–31.9)

Group 2

Singular

5107

74.6

45.5 (44.8–46.1)

0.077

Twin/triplet

264

70.5

42.4 (39.3–45.5)

Maternal age

Group 1

<20 years

200

47.0

29.5 (25.6–33.4)^a

0.017

20–34 years

3293

52.7

31.9 (31.9–33.9)^a

≥ 35 years

864

56.5

35.2 (33.3–37.0)^b

Group 2

< 20 years

201

71.1

43.4 (39.9–46.9)^a.b

< 0.001

20–34 years

3812

76.4

46.4 (45.6–47.1)^a

≥35 years

1377

69.4

42.7 (41.2–44.0)^b

Mode of delivery

Group 1

Normal

1447

52.0

32.6 (31.2–34.1)

0.565

Cesarean

2765

51.7

32.3 (31.2–33.3)

Group 2

Normal

1732

73.3

44.8 (43.7–46.0)

0.611

Cesarean

3524

74.2

45.1 (44.3–46.0)

Region

Group 1

West

1653

56.1

34.7 (33.3–36.1)^a

0.001

South

575

54.6

34.1 (31.9–36.4)^ab

Central

784

50.3

31.7 (29.7–33.7)^bc

North

226

61.9

37.9 (34.4–41.4)^a

East

1144

49.0

31.0 (29.4–32.6)^c

Group 2

West

2154

80.0

48.3 (47.4–49.3)^a

< 0.001

South

703

72.8

44.3 (42.5–46.1)^b

Central

1040

75.1

45.9 (44.4–47.3)^b

North

319

74.3

45.1 (42.4–47.8)^b

East

1188

64.7

40.0 (38.5–41.6)^c