'TAHE first of the two annual conversaziones which A are given by the Royal Society in its rooms at Burlington House, took place on Wednesday evening, May 16. There was a large attendance, and throughout the evening interested groups were gathered round the exhibits which were shown in the Officers' Room, the Council Room, the Old Council Room, the Principal Library, the Committee Room, and the...

this is a descriptive study. the purpose was to determine how children with leukemia receives nursing care. a sample of 40 children with leukemia from six hematology wards in three hospitals was selected. data were gathered by observation, children's documents, and then filling an observational check list. results showed that nursing care in 65 percent of cases was intermediate, and in 35 ...

acute gastroenteritis (age) has a great impact on children less than five years of age, producing high levels of morbidity and mortality. worldwide, age is mainly related to viruses, mainly rotavirus but human adenovirus (hadv) in particular as an important etiologic agent. among hadv species f, genotypes 40 and 41 are responsible for a high number of diarrhea cases, mainly in children under 2 ...

BACKGROUND Central to the design of a randomised controlled trial is the calculation of the number of participants needed. This is typically achieved by specifying a target difference and calculating the corresponding sample size, which provides reassurance that the trial will have the required statistical power (at the planned statistical significance level) to identify whether a difference of...

A sample size calculation for logistic regression involves complicated formulae. This paper suggests use of sample size formulae for comparing means or for comparing proportions in order to calculate the required sample size for a simple logistic regression model. One can then adjust the required sample size for a multiple logistic regression model by a variance inflation factor. This method re...

Exact power and sample size calculation for bioequivalence studies with high order crossover designs using statistical software nQuery are presented. Such calculation can be very easily performed, and thus provides a convenient tool for practical usage.

Centro Nacional de Biotecnología, Campus Univ. Autónoma, 28049 Madrid, Spain, Health Research Inc., Howard Hughes Medical Institute at Wadsworth Center, Empire State Plaza, Albany, NY 12201-0509, and Department of Biomedical Sciences, State University of New York at Albany, University of Konstanz, Department of Biology, 78457 Konstanz, Germany, Max-Planck-Institut fur Biophysik, Frankfurt, Germany