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Table 1 Demographic and baseline characteristics

From: Porous tantalum implant for treatment of early-stage osteonecrosis of the femoral head: a minimum 5-year follow-up study

Classification

Tantalum rod group

Patients, n

42

Hips, n

52

Age (years)

40.1 ± 9.3 (22–59)

Gender, n(%)

 Female

12 (28.6%)

 Male

30 (71.4%)

BMI(Kg/m2)

25.6 ± 2.5

Age, n (%)

  > 40 years

33 (63.5%)

  ≤ 40 years

19 (36.5%)

Bilateral disease, n (%)

30 (57.69%)

Etiology, n (%)

 Corticosteroids

21 (40.38%)

 Alcoholism

23 (44.23%)

 Idiopathic

8 (15.38%)

ARCO stage, n (%)

 I

22 (42.31%)

 II

30 (57.69%)

Bone marrow edema

30 (57.69%)

Osteonecrotic lesion size ≥ 30%, n (%)

27 (51.92%)

Harris hip score

73.4 ± 6.3

Harris hip score, n (%)

  ≥ 80 points

10 (19.23%)

  < 80 points

42 (80.77%)

Duration of symptoms (months)

9.2 ± 3.7

Follow-up (months)

85.7 ± 16.6 (60–129)