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Sample size

XD Xinwen Du
YL Yuan Li
LF Lan Fu
HC Huaying Chen
XZ Xiaoxia Zhang
YS Yuping Shui
AZ Aihua Zhang
XF Xianqiong Feng
MF Mei Rosemary Fu
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Sample size calculation was based on the results (δ= 4.1, σ = 6.1) of our previous study exploring the effect of TOLF exercise on the number of lymphedema symptoms (16). The formula for comparing the difference between two means (two-sample t-test) was used: n1=n2=(Zα+Zβ)2∗2σ2δ and resulted in that a minimum sample size of 36 patients per group were needed with an α of 0.05 and a β of 0.8. Thus, we aimed to recruit a final sample of no less than 90 participants considering a 20% potential dropout rate.

Copyright and License information:  ©2022 Du, Li, Fu, Chen, Zhang, Shui, Zhang, Feng and Fu
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