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Table 6 Cumulative reoperation rates of fusion surgeries according to anatomic regions during the late period

From: Reoperations after fusion surgeries for degenerative spinal diseases depending on cervical and lumbar regions: a national database study

Late period (n = 41,856)

Unadjusted value

Adjusted value

P

HR

95% CI

p

HR

95% CI

Region

 Cervical fusion

 

1.000

  

1.000

 

 Lumbar fusion

0.0225

1.193

(1.025, 1.388)

0.0468

1.166

(1.002, 1.358)

Age (years)

 20–29

 

1.000

    

 30–39

0.5879

1.275

(0.529, 3.071)

   

 40–49

0.4621

1.363

(0.597, 3.110)

   

 50–59

0.1674

1.769

(0.787, 3.976)

   

 60–69

0.0701

2.110

(0.941, 4.735)

   

  ≥ 70

0.0946

1.997

(0.888, 4.492)

   

Gender

 Male

 

1.000

    

 Female

0.9412

0.995

(0.872, 1.135)

   

Diabetes

 Yes

0.0025

1.225

(1.074, 1.398)

   

 No

 

1.000

    

Associated comorbidities

 Yes

 < 0.0001

1.300

(1.140, 1.482)

0.0002

1.286

(1.127, 1.467)

 No

 

1.000

  

1.000

 

Hospital types

 Tertiary-referral hospital

 

1.000

    

 General hospital

0.2335

1.108

(0.936, 1.311)

   

 Hospital

0.0848

0.866

(0.735, 1.020)

   

 Clinic

0.4762

0.761

(0.359, 1.613)

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