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Table 1 Patients’ characteristics

From: Risk factors of early periprosthetic femoral fracture after total knee arthroplasty

Characteristics

PFF group (n = 24)

Control group (n = 96)

p-value

Age (yr)

77.1 ± 6.7

69.0 ± 7.2

< 0.001*

Gender (female,%)

22 (91.7%)

84 (87.5%)

0.733

Weight (kg)

63.5 ± 11.2

66.5 ± 12.8

0.287

Height (cm)

152.6 ± 7.6

154.9 ± 7.8

0.205

BMI (kg/m2)

27.3 ± 4.6

27.7 ± 4.8

0.701

Side (right,%)

20 (83.3%)

53 (55.2%)

0.012*

DCCI (scores)

0.5 ± 0.9

0.3 ± 0.5

0.348

Diagnosis (%)

 Osteoarthritis

22 (91.7%)

96 (100.0%)

0.039*

 Rheumatoid arthritis

2 (8.3%)

0 (0.0%)

 

Underlying diseases (%)

 Diabetes

5 (20.8%)

25 (26.0%)

0.598

 Hypertension

18 (75.0%)

73 (76.0%)

0.915

 Dyslipidemia

14 (58.3%)

34 (35.4%)

0.040*

 Cardiovascular disease

2 (8.3%)

5 (5.2%)

0.626

 Thyroid disease

1 (4.2%)

1 (1.0%)

0.361

 Parkinson disease

3 (12.5%)

0 (0.0%)

0.007*

Steroid use (%)

1 (4.2%)

0 (0.0%)

0.200

Surgical approach (%)

 Medial parapatellar

23 (95.8%)

95 (99.0%)

0.361

 Midvastus

1 (4.2%)

1 (1.0%)

 

Operative time (min)

81.5 ± 23.4

79.9 ± 30.2

0.201

Prosthesis design (%)

 Cruciate-retaining

0 (0.0%)

24 (25.0%)

0.004*

 Posterior-stabilized

24 (100.0%)

72 (75.0%)

 

Prosthesis brand (%)

 Zimmer

20 (83.3%)

63 (65.6%)

0.049*

 Depuy

3 (12.5%)

31 (32.3%)

 

 Stryker

1 (4.2%)

0 (0.0%)

 

 Smith Nephew

0 (0.0%)

2 (2.1%)

 
  1. PFF periprosthetic femoral fracture, BMI body mass index, DCCI Deyo-Charlson comorbidity index
  2. *p-value < 0.05