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Bone. 2005 Sep;37(3):388-94.

Physical function is impaired but quality of life preserved in patients with fibrous dysplasia of bone.

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Nursing and Patient Care Services of the Warren Grant Magnuson Clinical Center, Bethesda, MD 20892, USA.


Fibrous dysplasia of bone (FD) is a congenital, non-heritable skeletal disorder that is associated with multiple skeletal complications, including repeated fractures, limb length discrepancy, and bone pain. The disease-specific impact of FD on quality of life outcomes is unknown. We sought to understand the impact of the scope and extent of the skeletal disease on quality of life in adults and children with FD. The health-related quality of life was quantified in a population of adults (n = 56) and children (n = 22) with FD using validated health assessment questionnaires, the Medical Outcomes Study 36 Item Short-Form Health Survey, volume 2 (SF36) (adults) and the Child Health Questionnaire Parent Form 50 (CHQ-PF50) (children). Clinical demographic data and skeletal disease burden scores (SDBS, amount of skeleton involved with FD) were measured, and correlations with health-related quality of life were sought. The SF36 and CHQ-PF50 revealed lower Physical Function Summary scores in FD patients compared to the U.S. population norms (adult 41 vs. 50, Z score < -5.0, pediatric 39 vs. 50, Z score < -5.0). However, the SF36 and CHQ-PF50 Mental/Psychological summary scores were not different from those of U.S. population norms (adult 50 vs. 50, Z score = 0, pediatric 48 vs. 50 Z score = -0.9). The score on the Physical Function Domain of both tools was strongly negatively associated with the SDBS (adult Spearman rho = -0.43, P = 0.009, pediatric Spearman rho = -0.72, P = 0.005). The groups of adult and pediatric patients with SDBS > 30 had decreased Physical Function Domain scores when compared to those with scores < 30 (adult 35 vs. 45, P = 0.002, pediatric 57 vs. 78, P = 0.04, respectively). One of the largest effects was seen in the parents of children with FD, who had significantly lower Parental Emotional scores than those of the parents of healthy norms (54 vs. 88, Z score < -5.0), suggesting a high degree of emotional morbidity in the parents of children with FD. Despite measurable functional limitations in adults and children, and significant parental emotional impairment, patients with FD achieve a high level of social and emotional function. These data are important for prognosis and parental reassurance.

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