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Table 1 Basic characteristics of the THA patients included in the study stratified according to the severity of osteolysis at the acetabular site.

From: Variation in cytokine genes can contribute to severity of acetabular osteolysis and risk for revision in patients with ABG 1 total hip arthroplasty: a genetic association study

 

Mild osteolysis

(Types I, II)

Severe osteolysis

(Types III-V)

p Value#

Patients, N

89

116

 

Gender (men/women)

35/54

33/83

p = 0.101

Age at index surgery

48 (27-58)

45 (24-68)

p = 0.128

Primary diagnosis:

   

Osteoarthritis

35

13

 

Dysplastic hip

23

62

p < 0.001

Other diagnoses

31

41

 

BMI (kg/m2)

28.1 (20.3-35.7)

27.2 (16.0-42.6)

p = 0.062

Revision (yes)

44

113

p < 0.001

Age at event* (years)

55 (34-69)

52 (29-77)

p = 0.005

Time to event* (years)

9 (2-13)

6 (3-12)

p < 0.001

Harris hip score

78 (14-96)

65 (28-98)

p < 0.001

Prosthesis stable (yes)

82

86

p < 0.001

Linear wear rate (mm/year)

0.22 (0.04-0.92)

0.34 (0.04-2.52)

p = 0.009

  1. Data presented as median and range (minimum to maximum) in parentheses. # p values for comparison between the groups of patients with mild/severe osteolysis were calculated by Chi-squared test or Mann-Whitney U test as appropriate. *The "event" was defined as THA revision for revised patients or the final visit for non-revised patients.