Abdelmoneim El-Dali

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We conducted a feasibility study of a mobile phone messaging service for children and adolescents with type 1 diabetes. Two hundred children with type 1 diabetes took part in a six-month trial. The children were provided - through their parents - with daily information messages, with weekly interactive messages, and on request, with multimedia video(More)
A crucial step in designing a new study is to estimate the required sample size. For a design involving cluster sampling, the appropriate sample size depends on the so-called design effect, which is a function of the average cluster size and the intracluster correlation coefficient (ICC). It is well-known that under the framework of hierarchical and(More)
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