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Table 3 Subsequent surgery and hospitalization in hybrid CDAā€‰+ā€‰ACDF vs. multi-level ACDF.

From: A real-world analysis of hybrid CDA and ACDF compared to multilevel ACDF

Ā 

Full Sample

Primary 2-Level Surgery

Primary 3+-Level Surgery

Secondary Surgery

Ā 

Hybrid Surgery

ALL Episodes

mACDF

ALL Episodes

p1

Hybrid Surgery

ALL Episodes

mACDF

ALL Episodes

p1

Hybrid Surgery

ALL Episodes

mACDF

ALL Episodes

p1

Hybrid Surgery

ALL Episodes

mACDF

ALL Episodes

p1

N=

436

Ā N=

2,180

Ā N=

264

Ā N=

1,337

Ā N=

132

Ā N=

654

Ā N=

40

Ā N=

189

Subsequent Surgery

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Duration of Follow-up (Mean, SD)

673.8

514.5

704.1

559.0

Ā 

694.6

523.0

726.6

570.5

Ā 

636.7

495.2

660.1

536.1

Ā 

658.6

526.2

696.9

559.0

Ā 

Procedure Episodes

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Episodes with evidence of a

subsequent surgery (N, %)

9

2.1%

46

2.1%

Ā 

3

1.1%

29

2.2%

Ā 

3

2.3%

13

2.0%

Ā 

3

7.5%

4

2.1%

Ā 

Rate of subsequent surgery

(per 100 patient years)

1.9

-

1.8

-

Ā 

1.2

-

1.7

-

Ā 

2.2

-

1.8

-

Ā 

5.5

-

1.9

-

Ā 

30-Days Hospitalization

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

All-cause Hospitalization

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Episodes with a patient admission

(N, %)

20

4.6%

99

4.5%

Ā 

8

3.0%

64

4.8%

Ā 

7

5.3%

30

4.6%

Ā 

5

12.5%

5

2.6%

<ā€‰0.01

ā€ƒDays to hospitalization (Mean, SD)

7.0

6.5

8.9

8.1

Ā 

3.5

2.7

8.8

8.3

Ā 

7.0

7.5

8.7

7.6

Ā 

12.6

6.2

11.0

10.1

Ā 

ā€ƒMedian

5.5

-

7.0

-

Ā 

3.0

-

6.0

-

Ā 

4.0

-

7.0

-

Ā 

13.0

-

7.0

-

Ā 

ā€ƒRange

1

22

1

30

Ā 

1

6

1

30

Ā 

1

21

1

28

Ā 

6

22

2

25

Ā 

ā€ƒ% hospitalized (per 1 patient year)

0.67

-

0.87

-

Ā 

0.43

-

0.90

-

Ā 

0.87

-

0.98

-

Ā 

1.64

-

0.33

-

<ā€‰0.05

Spinal-Surgery Specific

Hospitalization 2

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Episodes with a patient admission

(N, %)

16

3.7%

76

3.5%

Ā 

8

3.0%

48

3.6%

Ā 

5

3.8%

24

3.7%

Ā 

3

7.5%

4

2.1%

Ā 

ā€ƒDays to hospitalization (Mean, SD)

7.6

6.7

8.3

7.7

Ā 

4.8

4.6

8.0

7.8

Ā 

9.4

7.8

8.2

7.3

Ā 

12.0

8.7

13.0

10.4

Ā 

ā€ƒMedian

6.0

-

6.0

-

Ā 

3.5

-

6.0

-

Ā 

9.0

-

6.5

-

Ā 

8.0

-

12.5

-

Ā 

ā€ƒRange

1

22

1

30

Ā 

1

14

1

30

Ā 

1

21

1

28

Ā 

6

22

2

25

Ā 

ā€ƒ% hospitalized (per 1 patient year)

0.46

-

0.61

-

Ā 

0.38

-

0.56

-

Ā 

0.48

-

0.82

-

Ā 

0.96

-

0.26

-

Ā 

90-Days Hospitalization

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

All-cause Hospitalization

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Episodes with a patient admission

(N, %)

20

4.6%

140

6.4%

Ā 

8

3.0%

87

6.5%

<ā€‰0.05

7

5.3%

45

6.9%

Ā 

5

12.5%

8

4.2%

<ā€‰0.05

ā€ƒDays to hospitalization (Mean, SD)

7.0

6.5

24.5

27.2

<ā€‰0.01

3.5

2.7

23.5

27.1

<ā€‰0.05

7.0

7.5

26.2

28.0

Ā 

12.6

6.2

26.4

26.3

Ā 

ā€ƒMedian

5.5

-

11.0

-

Ā 

3.0

-

9.0

-

Ā 

4.0

-

11.0

-

Ā 

13.0

-

21.5

-

Ā 

ā€ƒRange

1

22

1

88

Ā 

1

6

1

88

Ā 

1

21

1

88

Ā 

6

22

2

80

Ā 

ā€ƒ% hospitalized (per 1 patient year)

0.23

-

0.42

-

<ā€‰0.05

0.14

-

0.42

-

<ā€‰0.05

0.33

-

0.48

-

Ā 

0.57

-

0.18

-

<ā€‰0.05

Spinal-Surgery Specific

Hospitalization 2

Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā Ā 

Episodes with a patient admission

(N, %)

16

3.7%

106

4.9%

Ā 

8

3.0%

65

4.9%

Ā 

5

3.8%

35

5.4%

Ā 

3

7.5%

6

3.2%

Ā 

ā€ƒDays to hospitalization (Mean, SD)

7.6

6.5

22.9

27.2

<ā€‰0.05

4.8

2.7

20.8

27.1

Ā 

9.4

7.5

25.6

28.0

Ā 

12.0

6.2

29.5

26.3

Ā 

ā€ƒMedian

6.0

-

9.0

-

Ā 

3.5

-

9.0

-

Ā 

9.0

-

9.0

-

Ā 

8.0

-

21.5

-

Ā 

ā€ƒRange

1

22

1

89

Ā 

1

14

1

88

Ā 

1

21

1

89

Ā 

6

22

2

80

Ā 

ā€ƒ% hospitalized (per 1 patient year)

0.15

-

0.21

-

Ā 

0.13

-

0.19

-

Ā 

0.16

-

0.28

-

Ā 

0.33

-

0.09

-

Ā 
  1. mACDF: multilevel anterior cervical discectomy and fusion; SD: standard deviation
  2. 1 The lack of a p-value figure indicates comparison was not significant
  3. 2 The presence of spinal surgery- or spinal disease-related procedure or diagnosis codes on inpatient claims will be used to define spinal surgery-specific readmissions