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Table 4 Cumulative reoperation rates of fusion surgeries according to anatomic regions during the entire follow up period

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

Entire period (n = 42,060) Unadjusted value Adjusted value
P HR 95% CI p HR 95% CI
Region
 Cervical fusion   1.000    1.000  
 Lumbar fusion 0.0134 1.188 (1.036, 1.362) 0.0275 1.167 (1.017,1.339)
Age (years)
 20–29   1.000     
 30–39 0.7030 0.871 (0.430, 1.768)    
 40–49 0.8510 0.940 (0.492, 1.796)    
 50–59 0.4561 1.271 (0.677, 2.387)    
 60–69 0.1760 1.543 (0.823, 2.892)    
  ≥ 70 0.1671 1.559 (0.830, 2.929)    
Gender
 Male   1.000     
 Female 0.7845 0.9840 (0.873, 1.108)    
Diabetes
 Yes 0.0168 1.157 (1.027, 1.303)    
 No   1.000     
Associated comorbidities
 Yes 0.0003 1.241 (1.103, 1.397) 0.0019 1.208 (1.072,1.362)
 No   1.000    1.000  
Hospital types
 Tertiary-referral hospital   1.000    1.000  
 General hospital 0.0113 1.212 (1.044, 1.408) 0.0455 1.166 (1.003, 1.355)
 Hospital 0.0038 0.801 (0.689, 0.931) 0.0014 0.782 (0.673, 0.910)
 Clinic 0.3403 0.711 (0.352, 1.434) 0.3434 0.712 (0.353, 1.437)