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stat.ME2020★ 15 cited
Sample size calculation for the Andersen-Gill model comparing rates of recurrent events
Yongqiang Tang, Ronan Fitzpatrick
Recurrent events arise frequently in biomedical research, where the subject may experience the same type of events more than once. The Andersen-Gill (AG) model has become increasin…
stat.ME2020★ 7 cited
An improved sample size calculation method for score tests in generalized linear models
Yongqiang Tang, Liang Zhu, Jiezhun Gu
Self and Mauritsen (1988) developed a sample size determination procedure for score tests in generalized linear models under contiguous alternatives. Its performance may deteriorat…
stat.ME2020★ 2 cited
Notes on Exact Power Calculations for t Tests and Analysis of Covariance
Yongqiang Tang
Tang derived the exact power formulae for t tests and analysis of covariance (ANCOVA) in superiority, noninferiority and equivalence trials. The power calculation in equivalence tr…