Congenital or hereditary myasthenia describes a heterogeneous group of disorders in which the immune system is not implicated. Treatment has previously depended on anticholinesterase medication. The effectiveness of 3,4-diaminopyridine (3,4-DAP), a preparation that enhances acetylcholine release from motor nerve terminals, has been evaluated using a series of standardised strength measures. Six...

      There are evidences that statins have anti-inflammatory effects beyond their cholesterol lowering properties. The study was conducted to assess the effects of atorvastatin on asthma as an inflammatory disease. Patients with moderate to severe asthma were entered this randomized, double blind, crossover clinical trial. The impact of oral atorvastatin (10 mg/day) on the lung function of nor...

Crossover clinical trial design attracts a lot of attention in today’s drug development environment because of its unique characteristics. This paper will start with an introduction of a 2 * 2 crossover clinical trial design, then a review of advantages and disadvantages of cross over studies compared with parallel studies. Different types of SAS procedure, such as PROC TTEST, PROC GLM and PROC...

Crossover clinical trials can provide substantial benefits by eliminating inter-patient variation from treatment comparisons and by allowing multiple observations of each patient. They are particularly useful when sample sizes are necessarily small. These advantages proved particularly valuable in an assessment of clot prevention in children undergoing haemodialysis. Only small numbers of child...

BACKGROUND Offering patients in oncology trials the opportunity to cross over to active treatment at disease progression is a common strategy to address ethical issues associated with placebo controls but may lead to statistical challenges in the analysis of overall survival and cost-effectiveness because crossover leads to information loss and dilution of comparative clinical efficacy. OBJEC...

Alternative designs can increase the feasibility of pediatric trials when compared to classical parallel designs (PaD). In this work we present a model-based approach based on clinical trial simulations for the comparison of PaD with the alternative sequential, crossover, and randomized withdrawal (RWD) designs. Study designs were evaluated in terms of: type I and II errors, sample size per arm...

Title: The use of an alternate side lying positioning strategy during inhalation therapy does not prolong nebulisation time in adults with Cystic Fibrosis: a randomised crossover trial Authors: Ruth Dentice ([email protected]) Mark Elkins ([email protected]) Genevieve Dwyer ([email protected]) Peter Bye ([email protected]) Version: 1 Date: 18 Sep 2017 Autho...

In this double-blind crossover trial, naproxen (750 mg/day) was compared to placebo for the treatment of osteoarthrosis of the hip and knee. Patients were randomly assigned to treatment with either naproxen or placebo for 4 weeks and then to treatment with the alternate agent for a second 4-week period. 8 out of 9 objective and subjective measurements of drug efficacy clearly differentiated nap...

OBJECTIVE To describe the effect of physicians' dress on patient confidence and trust. DESIGN A prospective crossover trial involving physicians dressed in "respectable" versus "retro" attire. SETTING A general medicine ward at a tertiary hospital. PARTICIPANTS 12 male general physicians and 1680 patients. MAIN OUTCOME MEASURES Patient trust and confidence as measured by a questionnaire...