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Table 1 Pre-operative patient characteristics

From: Total knee arthroplasty in patients with severe obesity: outcomes of standard keeled tibial components versus stemmed universal base plates

Variable

Standard (n = 57)

UBP (n = 54)

Mean difference (95% CI)

p-Value

Age (years)

64.8 (8.0)

63.6 (8.0)

−1.23 (−4.2 to 1.8)

0.903*

Female sex

40 [70]

42 [78]

 

0.392^

BMI in kg/m2

42.5 (40.6–43.9)

43.4 (41.4–46.4)

 

0.234**

Number of comorbidities

1 (0–1)

1 (0–2)

 

0.656**

Indication

    

OA

55 [96]

54 [100]

 

0.388^

IA

1 [2]

0

  

Post-HTO

1 [2]

0

  

Length of hospital stay (median, days)

5 (4–6)

4 (3–6)

 

0.049**

Length of F/U (years)

5.1 (1.6)

4.6 (1.8)

−0.50 (−1.1 to 0.1)

0.496*

Pre-operative PROMs

    

EQ-5D VAS

65.3 (20.4)

63.8 (22.7)

−1.5 (−9.6 to 6.6)

0.296*

EQ-5D

0.296 (0.31)

0.271 (0.31)

−0.03 (−0.141 to 0.09)

0.723**

Pain VAS

49.8 (23.2)

49.4 (20.3)

−0.41 (−8.7 to 7.9)

0.226*

OKS

17.4 (7.3)

17.6 (7.1)

0.27 (−2.5 to 3.0)

0.594*

  1. Mean (SD), median (IQR), number [%]. ^Chi square, *t-test, **Mann–Whitney U-test