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Data analysis and statistical methods

CT Chao-Ming Tseng
HW Hsi-Hao Wang
CL Ching-Tai Lee
CT Chi-Ming Tai
CT Cheng-Hao Tseng
CC Chih-Cheng Chen
YT Ying-Nan Tsai
TC Tzu-Haw Chen
MH Ming-Hung Hsu
CW Chih-Chun Wang
TH Tzer-Zen Hwang
HW Hsiu-Po Wang
WW Wen-Lun Wang
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Data are presented as the mean ± standard deviation or the number and percentage. Categorical variables were compared using the chi-squared test and continuous variables were analyzed using student’s t-test. Hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated using the Cox proportional hazard model. All statistical tests were two-sided, conducted at a significance level of 0.05, and reported using a P-value and/or 95% CIs. Incidence pattern trends were analyzed using a Cochran-Armitage trend test. All analyses were performed using SAS software, version 9.4 (SAS Institute, Cary, NC, USA).

Copyright and License information: The Author(s) ©2020
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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