A Trial Comparing Mini-posterior Approach and Direct Anterior Approach

The primary early functional endpoint is the difference between groups in the postoperative days that patients require any assistive devices for ambulation. Lower number of days indicate better outcomes.

The postoperative rate of improvement in functional outcome, measured by the Harris Hip Score (HHS). The HHS was developed to assess the results of hip surgery and is intended to evaluate various hip disabilities and methods of treatment in an adult population. The domains covered are pain, function, absence of deformity, and range of motion. The function domain consists of daily activities (stair use, using public transportation, sitting, and managing shoes and socks) and gait (limp, support needed, and walking distance). Deformity takes into account hip flexion, adduction, internal rotation, and extremity length discrepancy. Range of motion measures hip flexion, abduction, external and internal rotation, and adduction. There are 10 items, which are summed to create a score out of 100. The score has a range of 0 (wost possible outcome) to 100 (best possible outcome) covering pain (0-44 points), function (0-47 points), absence of deformity (4 points), and range of motion (5 points).

Total score from the Western Ontario and McMaster Universities Arthritis Index (WOMAC), which is a widely used set of standardized questionnaires used to evaluate the condition of patients with osteoarthritis of the knee and hip, including pain, stiffness, and physical functioning of the joints. WOMAC measures five items for pain (score range 0-20), two for stiffness (range 0-8), and 17 for functional limitation (range 0-68). Physical functioning questions cover everyday activities such as stair use, standing up from a sitting or lying position, standing, bending, walking, getting in/out of a car, shopping, putting on or taking off socks, lying in bed, getting in or out of a bath, sitting, and heavy and light household duties. It produces three subscale scores (pain, stiffness, and physical function) and a total score. These scores are transformed into a scale of 0 (worst possible outcome) to 100 (best possible outcome) for ease of interpretation and comparison with other studies.

Abduction angle is a radiographic measure of implant position. 40 degrees of abduction is optimal. 30-50 degrees of anteversion indicates correct placement of prosthetic joint. Values closer to 40 degrees indicate better placement.

Anteversion angle is a radiographic measure of implant position. 35 degrees of anteversion is optimal. 25-45 degrees of anteversion indicates correct placement of prosthetic joint. Values closer to 35 degrees indicate better placement.

The postoperative rate of improvement in functional outcome, measured by the Harris Hip Score (HHS). The HHS was developed to assess the results of hip surgery and is intended to evaluate various hip disabilities and methods of treatment in an adult population. The domains covered are pain, function, absence of deformity, and range of motion. The function domain consists of daily activities (stair use, using public transportation, sitting, and managing shoes and socks) and gait (limp, support needed, and walking distance). Deformity takes into account hip flexion, adduction, internal rotation, and extremity length discrepancy. Range of motion measures hip flexion, abduction, external and internal rotation, and adduction. There are 10 items, which are summed to create a score out of 100. The score has a range of 0 (wost possible outcome) to 100 (best possible outcome) covering pain (0-44 points), function (0-47 points), absence of deformity (4 points), and range of motion (5 points).

Total score from the Western Ontario and McMaster Universities Arthritis Index (WOMAC), which is a widely used set of standardized questionnaires used to evaluate the condition of patients with osteoarthritis of the knee and hip, including pain, stiffness, and physical functioning of the joints. WOMAC measures five items for pain (score range 0-20), two for stiffness (range 0-8), and 17 for functional limitation (range 0-68). Physical functioning questions cover everyday activities such as stair use, standing up from a sitting or lying position, standing, bending, walking, getting in/out of a car, shopping, putting on or taking off socks, lying in bed, getting in or out of a bath, sitting, and heavy and light household duties. It produces three subscale scores (pain, stiffness, and physical function) and a total score. These scores are transformed into a scale of 0 (worst possible outcome) to 100 (best possible outcome) for ease of interpretation and comparison with other studies.

The postoperative rate of improvement in functional outcome, measured by the Harris Hip Score (HHS). The HHS was developed to assess the results of hip surgery and is intended to evaluate various hip disabilities and methods of treatment in an adult population. The domains covered are pain, function, absence of deformity, and range of motion. The function domain consists of daily activities (stair use, using public transportation, sitting, and managing shoes and socks) and gait (limp, support needed, and walking distance). Deformity takes into account hip flexion, adduction, internal rotation, and extremity length discrepancy. Range of motion measures hip flexion, abduction, external and internal rotation, and adduction. There are 10 items, which are summed to create a score out of 100. The score has a range of 0 (wost possible outcome) to 100 (best possible outcome) covering pain (0-44 points), function (0-47 points), absence of deformity (4 points), and range of motion (5 points).

Total score from the Western Ontario and McMaster Universities Arthritis Index (WOMAC), which is a widely used set of standardized questionnaires used to evaluate the condition of patients with osteoarthritis of the knee and hip, including pain, stiffness, and physical functioning of the joints. WOMAC measures five items for pain (score range 0-20), two for stiffness (range 0-8), and 17 for functional limitation (range 0-68). Physical functioning questions cover everyday activities such as stair use, standing up from a sitting or lying position, standing, bending, walking, getting in/out of a car, shopping, putting on or taking off socks, lying in bed, getting in or out of a bath, sitting, and heavy and light household duties. It produces three subscale scores (pain, stiffness, and physical function) and a total score. These scores are transformed into a scale of 0 (worst possible outcome) to 100 (best possible outcome) for ease of interpretation and comparison with other studies.