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Find 3,895 clinical trials for rheumatoid arthritis near Philadelphia, Pennsylvania. Connect with research centers in your area.
Showing 3881-3895 of 3,895 trials
NCT00000155
To describe the clinical course of keratoconus and to describe the relationships among its visual and physiological manifestations, including high- and low-contrast visual acuity, corneal curvature, slit lamp biomicroscopic findings, corneal scarring, and quality of life. To identify risk factors and protective factors that influence the severity and progression of keratoconus.
NCT00035139
Traumatic Brain Injury (TBI) is the leading cause of acquired long term disability among children and young adults. Deficits in attention and memory are common and persist for years after moderate or severe TBI. The similarity between these symptoms and those of children with AD/HD, the efficacy of methylphenidate in the treatment of AD/HD, and the efficacy of methylphenidate in improving recovery of animals with brain injuries, support the need to study methylphenidate effects in children with TBI. This investigation of methylphenidate in children with moderate to severe TBI aims to: (1) Assess the acute effects of 2 different dosages of methylphenidate on attention and reaction time when the medication is administered to children early in recovery; (2) Assess the ability of 8 weeks of methylphenidate to improve the rate of recovery of cognitive, memory, and attentional skills in children with TBI; (3) Identify the frequency of common methylphenidate side effects in children with TBI.