One-stage bilateral Unilateral control p-valuel
Number of patients Patients (hips) 32 (64) 32 (32) NA
Sex Male/Female 11/21 12/20 0.79
Age Median years (range) 51 (29 – 70) 51 (34 – 66) 0.872
ASA score (1 – 5) I
II
III
21
10
1
20
9
3
0.58
Charnley
class
A
B
C
0
24
8
15
7
10
0.583
Diagnosis Primary osteoarthritis
Rheumatoid arthritis
Childhood hip disease
Avascular necrosis
Other secondary osteoarthritis
18
1
8
3
2
18
1
9
2
2
0.92
1Two-sided Pearson Chi-square tests were used if not other indicated
2Mann Whitney U test
3Charnley class A and B were grouped for statistical testing
Table 1: Demography.