Table 1: Patient demographics, perioperative data, and component data.

Demographics

Age at surgery [mean (range)]22 (15–29)
Gender24 F (60%)
16 M (40%)
BMI [mean (range)]27 (19–43)
Side19 L (47.5%)
21 R (52.5%)
Prior-hip surgery20 (50%)
Charnley class A21 (52.5%)
Charnley class B10 (25%)
Charnley class C9 (22.5%)

Diagnosis

OA secondary to pediatric hip diseases21 (52.5%)
Avascular necrosis (AVN)12 (30%)
Inflammatory arthritis3 (7.5%)
Failed hip fusion2 (5%)
Septic arthritis1 (2.5%)
Posttraumatic arthritis1 (2.5%)

Perioperative data

Estimated blood loss [mean (95% CI)]456 (374–537)
Postoperative transfusions6 (15%)
Intraoperative fractures2 (5%)
Posterior approach30 (75%)
Anterolateral approach8 (20%)
Direct lateral approach2 (5%)

Femoral component

Modular cementless stem17 (42.5%)
Nonmodular cementless stem23 (57.5%)

Acetabular component

Monoblock CoCr Cup21 (52.5%)
Titanium cup with coCr insert6 (15%)
Titanium cup with polyethylene insert13 (32.5%)

Articulation

Metal-on-metal27 (67.5%)
Metal-on-conventional polyethylene11 (27.5%)
Metal-on-highly cross-linked polyethylene1 (2.5%)
Metal-on-vitamin E cross-linked polyethylene1 (2.5%)

Femoral head size

22 mm to 28 mm14 (35%)
32 mm to 38 mm12 (30%)
40 mm to 56 mm14 (35%)