Table 1.

PICOS strategy for study characteristics.

Participants	Patients Undergoing Total Hip Replacement for Treatment of End-Stage Primary Hip Osteoarthritis
Intervention	Total hip replacement with use of one of the surgical approaches to the hip joint (anterolateral, posterior, or direct lateral)
Comparisons	Patients undergoing total hip replacement via direct anterior approach to the hip joint
Outcomes	Radiographic analysis (femoral stem alignment, mean radiographic cup inclination, mean radiographic cup anteversion, mean radiographic cup abduction, position in Lewinnek’s safe zone)
Study design	Randomized controlled trial