Table 2 Multivariable analysis of independent risk factors for DVT
Perioperative factors | P value | OR | 95% CI |
|---|---|---|---|
Surgical site | |||
 THA | 1.00 (reference) | – | – |
 TKA | 0.034 | 1.836 | (1.047–3.222) |
Age (years) | |||
  ≤ 60 | 1.00 (reference) | – | – |
  > 60 to ≤ 70 | 0.614 | 1.178 | (0.624–2.223) |
  > 70 | 0.028 | 1.991 | (1.007–3.683) |
Drain use | |||
 No | 1.00 (reference) | – | – |
 Yes | 0.003 | 4.920 | (1.732–14.050) |
Ambulation time | |||
  ≤ 24 h | 1.00 (reference) | – | – |
  > 24 h to ≤ 48 h | 0.310 | 1.669 | (0.620–4.495) |
  > 48 h to ≤ 72 h | 0.083 | 2.174 | (0.904–5.229) |
  ≥ 72 h | 0.000 | 6.166 | (2.859–13.301) |