This is a retrospective and prospective, multi-center, post-market clinical follow-up study involving orthopedic surgeons skilled in THA and experienced implanting the study device system.
The objective of this study is to obtain implant survivorship and clinical outcomes data for the commercially available MOTIVATION HIP Total Hip System used in primary total hip arthroplasty (THA).
Study Type
OBSERVATIONAL
Enrollment
500
To systemically document the clinical safety and performance of the commercially available MOTIVATION HIP Total Hip System in primary THA.
Shanghai Tenth Hospital
Shanghai, Shanghai Municipality, China
Implant survivorship based on revision rate
Implant survivorship will be assessed using a Kaplan-Meier analysis. Data will be considered right-censored for all subjects that do not have a device related failed. For subjects who are lost-to-follow up, their last available clinical visit will be considered as the censored date. For subjects who died during the study, their death date will be used as the censored date. The survivorship point estimate and 95% confidence interval about the point estimate will be calculated for each follow up visit (1 year, 2 years, 3 years, 5 years, 7 years and 10 years).
Time frame: 10 years
Functional outcome based on Harris Hip Score
Harris Hip Score is a clinician-based outcome measure consisting of 4 subscales. The first is pain, which measures pain severity (44 points); function, which is made up of daily activities and gait (47 points); the absence of deformity, which is a subscale that measures hip flexion, adduction, internal rotation, leg length discrepancy and range of motion measures.(4 points), and range of motion (5 points). The scores range from 0-100 with higher scores representing less dysfunction and better outcomes.
Time frame: 10 years
Quality of life based on EQ-5D questionnaire
EQ-5D is a standardized measure of health-related quality of life states consisting of 5 dimensions, namely mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. The EQ-5D-5L version was used in the study. Each dimension has 5 responses recording 5 levels of severity (no problems/slight problems/moderate problems/severe problems or extreme problems). The responses to the EQ-5D dimensions are used to obtain a single EQ-5D index value where 1 represents full health and 0 represents death. The questionnaire also includes a vertical, visual analogue scale (EQ VAS) for the respondents to record their self-rated health where the 2 extreme ends of the scale are labelled as 'Best imaginable health state' and 'Worst imaginable health state' respectively.
Time frame: 10 years
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Safety assessment
Summarize the category, incidence and frequency of adverse events
Time frame: 10 years