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Table 1 Sociodemographic and clinical patient characteristics at pre-surgery (N = 1565)

From: Higher body mass index is associated with larger postoperative improvement in patient-reported outcomes following total knee arthroplasty

  

Mean (SD)

 

Age

 

69.1 (10.1)

 
  

N

(%)

Sex

 Women

 

974

(62.2%)

 Men

 

591

(37.8%)

Education

 Compulsory school

 

479

(31.2%)

 More than compulsory school (A-levels, apprenticeship, university)

 

1058

(68.8%)

Missing

 

28

 

Employment status

 Full-time or part-time

 

293

18.9%

 Retired

 

730

47.1%

 Homemaker

 

448

28.9%

 Other

 

51

5.1%

 Missing

 

16

 

Smoking

 No

 

1277

(82.6%)

 Yes

 

269

(17.4%)

 Missing

 

19

 

Side of implant

 Left

 

748

(47.8%)

 Right

 

817

(52.2%)

BMI (%)

  ≤ 24.99

normal weight

332

(21.2%)

 25.00–29.99

pre-obesity

578

(36.9%)

 30.00–34.99

class I obesity

423

(27.0%)

 35.00–39.99

class II obesity

160

(10.2%)

  ≥ 40.00

class III obesity

72

(4.6%)

Computer navigation

 Yes

 

931

61.0%

 Noa

 

595

39.0%

 Missing

 

39

 
  1. aincluding N = 33 aborted navigations