Table 5 Association rules analysis of different severity CHD and comorbidities in children

Severe CHD

Perinatal diseases

2.22

45.24

1.01

Circulatory system diseases

1.52

30.95

0.62

Other congenital anomalies

1.40

28.57

2.07

Respiratory system diseases

1.17

23.81

1.12

Blood diseases

0.93

19.05

1.14

Endocrine diseases

0.93

19.05

0.59

Genitourinary system diseases

0.70

14.29

0.87

Musculoskeletal system diseases

0.58

11.90

1.40

Mental disorders

0.58

11.90

1.01

Digestive system diseases

0.58

11.90

0.57

Skin and subcutaneous tissue diseases

0.35

7.14

1.13

Nervous system diseases

0.23

4.76

0.36

Shunt CHD

Perinatal diseases

32.83

53.52

1.19

Circulatory system diseases

25.47

41.52

0.83

Endocrine diseases

17.06

27.81

0.86

Digestive system diseases

13.20

21.52

1.04

Respiratory system diseases

12.73

20.76

0.98

Pregnancy, childbirth, and puerperium complications

10.63

17.33

1.44

Other congenital anomalies

10.16

16.57

1.20

Genitourinary system diseases

9.46

15.43

0.94

Blood diseases

7.83

12.76

0.76

Eye and adnexa diseases

7.48

12.19

1.26

Nervous system diseases

7.36

12.00

0.90

Mental disorders

7.01

11.43

0.97

Skin and subcutaneous tissue disease

4.09

6.67

1.06

Musculoskeletal system disease

4.09

6.67

0.78

Neoplasms

3.04

4.95

1.15

Infectious diseases

1.17

1.90

1.09

Ear and mastoid process diseases

0.23

0.38

1.09

Valve CHD

Circulatory system diseases

19.16

65.60

1.32

Endocrine diseases

11.80

40.40

1.25

Perinatal diseases

9.58

32.80

0.73

Blood diseases

6.89

23.60

1.41

Digestive system diseases

6.07

20.80

1.00

Respiratory system diseases

5.61

19.20

0.90

Genitourinary system diseases

4.91

16.80

1.03

Nervous system diseases

4.67

16.00

1.20

Musculoskeletal system diseases

3.39

11.60

1.36

Mental disorders

3.04

10.40

0.88

Eye and adnexa diseases

2.22

7.60

0.78

Other congenital anomalies

1.75

6.00

0.44

Skin and subcutaneous tissue diseases

1.64

5.60

0.89

Pregnancy, childbirth and puerperium complications

1.40

4.80

0.40

Neoplasms

1.17

4.00

0.93

Infectious diseases

0.35

1.20

0.68