Total hip replacement in young adults with XXXX : age at diagnosis, previous treatment, quality of life, and validation of diagnoses reported to the Norwegian Arthroplasty Register between 1987 and 2007.

@entity1 @entity572 @entity1141
BACKGROUND AND PURPOSE: Dysplasia of the hip increases the risk of secondary degenerative change and subsequent total hip replacement. Here we report on age at diagnosis of @entity1141 , previous treatment, and quality of life for @entity1 born after 1967 and registered with a total hip replacement due to @entity1141 in the Norwegian Arthroplasty Register. We also used the medical records to validate the diagnosis reported by the orthopedic surgeon to the register. METHODS: Subjects born after January 1, 1967 and registered with a primary total hip replacement in the Norwegian Arthroplasty Register during the period 1987-2007 (n = 713) were included in the study. Data on hip symptoms and quality of life (EQ-5D) were collected through questionnaires. Elaborating information was retrieved from the medical records. RESULTS: 540 of 713 @entity1 (76%) (corresponding to 634 hips) returned the questionnaires and consented for additional information to be retrieved from their medical records. @entity572 accounted for 163 of 634 hip replacements (26%), 134 of which were in females (82%). Median age at time of diagnosis was 7.8 (0-39) years: 4.4 years for females and 22 years for males. After reviewing accessible medical records, the diagnosis of @entity572 was confirmed in 132 of 150 hips (88%). INTERPRETATION: One quarter of hip replacements performed in @entity1 aged 40 or younger were due to an underlying @entity572 , which, in most cases, was diagnosed during late childhood. The @entity1141 diagnosis reported to the register was correct for 88% of the hips.
