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) |  |  |  |