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Table 2 Binary regression model for perioperative predictors of prolonged length of hospital stay

From: Perioperative predictors of prolonged length of hospital stay following total knee arthroplasty: a retrospective study from a single center in China

VariablesP-valueOdds Ratio (95%CI)
Age (>65 vs ≤ 65)0.0321.98 (0.85 to 1.41)
Clinical protocol (vs current)
 Traditional< 0.016.81 (3.85 to 12.04)
Operative time (≥110 min vs)
 ≤ 70 min0.0481.96 (0.99 to 3.89)
 70-110 minns1.19 (0.86 to 2.69)
Surgeon (vs 4)
 10.0150.39 (0.03 to 0.30)
 2ns0.77 (0.42 to 1.43)
 3ns0.86 (0.47 to 1.40)
Comorbidities (vs healty)
 Cardiovascularns1.14 (0.56 to 1.78)
 Neurological0.0272.13 (2.11 to 3.32)
 ASA classification (III/IV vs I/II)0.0451.91 (1.01 to 3.59)
 ROM (<90°vs ≥ 90°)ns1.31 (−0.14 to 0.49)
 Transfusion (no vs yes)ns0.82 (0.53 to 1,23)
 Complications (no vs yes)< 0.010.28 (0.14 to 0.56)
 Ward (B vs A)< 0.014.23 (1.76 to 3.14)
Intraoperative blood loss(≥300 ml vs)
 ≤ 1500.0292.05 (1.08 to 3.92)
 150–300ns1.71 (0.97 to 3.40)
 Preoperative Hb(g/L)ns0.98 (0.32 to 1.41)
  1. P < 0.05 was considered statistically significant. ROM Range of motion, CI Confidence interval