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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

Variables

P-value

Odds Ratio (95%CI)

Age (>65 vs ≤ 65)

0.032

1.98 (0.85 to 1.41)

Clinical protocol (vs current)

 Traditional

< 0.01

6.81 (3.85 to 12.04)

Operative time (≥110 min vs)

 ≤ 70 min

0.048

1.96 (0.99 to 3.89)

 70-110 min

ns

1.19 (0.86 to 2.69)

Surgeon (vs 4)

 1

0.015

0.39 (0.03 to 0.30)

 2

ns

0.77 (0.42 to 1.43)

 3

ns

0.86 (0.47 to 1.40)

Comorbidities (vs healty)

 Cardiovascular

ns

1.14 (0.56 to 1.78)

 Neurological

0.027

2.13 (2.11 to 3.32)

 ASA classification (III/IV vs I/II)

0.045

1.91 (1.01 to 3.59)

 ROM (<90°vs ≥ 90°)

ns

1.31 (−0.14 to 0.49)

 Transfusion (no vs yes)

ns

0.82 (0.53 to 1,23)

 Complications (no vs yes)

< 0.01

0.28 (0.14 to 0.56)

 Ward (B vs A)

< 0.01

4.23 (1.76 to 3.14)

Intraoperative blood loss(≥300 ml vs)

 ≤ 150

0.029

2.05 (1.08 to 3.92)

 150–300

ns

1.71 (0.97 to 3.40)

 Preoperative Hb(g/L)

ns

0.98 (0.32 to 1.41)

  1. P < 0.05 was considered statistically significant. ROM Range of motion, CI Confidence interval