Lu, Kaifeng; Luo, Xiaohui; Chen, Pei-Yun - In: International Journal of Biostatistics 4 (2008) 1, pp. 1098-1098
In designing longitudinal studies, researchers must determine the number of subjects to randomize based on the power to detect a clinically meaningful treatment difference and a proposed analysis plan. In this paper, we present formulas for sample size estimation and an assessment of statistical...