Table 1.

The characteristics of the patients from whom the 154 implants had been retrieved

Characteristic	Result*
Male:female	75:70
Age (years) at implantation (mean ± SD)	62 ± 14
Body mass index (kg/m2, mean ± SD)	28 ± 6
Hip side (right:left)	77:77
Reason for revision (number of hips)
Infection	67 (43.5)
Aseptic loosening	64 (41.6)
Instability	8 (5.2)
Periprosthetic fracture	7 (4.5)
Dislocation	5 (3.2%)
Leg length discrepancy	2 (1.3)
Implant malpositioning	1 (0.7)

^*Continuous variables are presented as mean ± SD. Categorical variables are presented as number (%).