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Table 4 Multi-factor linear regression analysis (N = 167)

From: Factors associated with the length of stay in total knee arthroplasty patients with the enhanced recovery after surgery model

Factors

β

S.E

T value

P value

95%CI

Gender (X1)

 Female

(Control group)

 Male

− 3.56

1.58

− 2.25

0.03

− 6.69~− 0.42

Age (X2)

 Y < 50

(Control group)

 50 ≤ Y < 60

2.80

3.30

0.85

0.40

− 3.72~9.34

 60 ≤ Y < 70

0.26

3.33

0.08

0.94

− 6.32~6.86

 70 ≤ Y < 80

− 0.82

3.36

− 0.24

0.81

− 7.46~5.83

 80 ≤ Y

− 0.67

3.88

− 0.17

0.86

− 8.35~7.01

ASA class (X3)

 1

(Control group)

 2

2.49

1.36

1.83

0.07

− 0.21~5.18

 3

4.84

2.51

1.92

0.049

− 0.14~9.81

Duration T (X4)

 T < 2H

(Control group)

 2H ≤ T < 3H

1.07

2.13

0.50

0.62

− 3.16~5.29

 2H ≤ T < 3H

8.09

2.86

2.84

0.005

2.44~13.74

 4H ≤ T < 5H

5.26

6.61

0.80

0.43

− 7.83~18.35

 T ≥ 5H

4.71

5.74

0.82

0.41

− 6.67~16.09

Pre-operation albumin (X5)

 ≥ 30 g/L

(Control group)

 < 30 g/L

18.33

5.41

3.39

0.001

7.61~29.05

Pre-operation ESR (X6)

 < 15 mmol/h

(Control group)

 ≥ 15 mmol/h

2.21

1.01

2.18

0.03

0.21~4.22

Primary disease (X7)

 KOA

(Control group)

 KRA

− 3.04

2.15

− 1.42

0.16

− 7.30~1.21

Merge disease (X8)

 No

(Control group)

 Yes

1.97

1.12

1.76

0.08

− 0.54~2.92

Tourniquet (X9)

 No

(Control group)

 Yes

8.60

4.58

1.88

0.06

− 0.48~17.68

  1. ASA American Society of Anesthesiologists, ESR erythrocyte sedimentation, KOA knee osteoarthritis, KRA knee rheumatoid arthritis