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