TABLE I.

Outcomes Reported Within the First 6 Postoperative Months

Outcome	All Patients* (N = 25,919)	Training Cohort* (N = 17,279)	Test Cohort* (N = 8,640)
Revision	789 (3.0%)	538 (3.1%)	251 (2.9%)
Periprosthetic joint infection	296 (1.1%)	204 (1.2%)	92 (1.1%)
Dislocation	172 (0.7%)	116 (0.7%)	56 (0.6%)
Periprosthetic fracture	124 (0.5%)	76 (0.4%)	43 (0.5%)
Other†	102 (0.4%)	73 (0.4%)	34 (0.4%)
Reason missing	95 (0.4%)	69 (0.4%)	26 (0.3%)
Death	172 (0.7%)	111 (0.6%)	61 (0.7%)

^*The values are given as the number of events, with the percentage in parentheses.

^†This category includes the following revision reasons: breakdown of the liner; breakdown of the femoral head; free-floating, unstabilized femoral stem or non-ossified femoral stem; unclear pain; aseptic loosening of the femur; periprosthetic fracture of the acetabulum; unstabilized cup or non-ossified cup; repair of lower limb-length discrepancy; malposition of the femoral component; malposition of the acetabular component; aseptic loosening of the acetabular component; and miscellaneous.