New-onset atrial fibrillation can be falsely associated with increased length of stay in ICU due to immortal time bias

Affiliations

¹ Department of oncology, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, People's Republic of China.
² Department of colorectal surgery, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, People's Republic of China. chtgao@wmu.edu.cn.

Comment

Yifang Lu et al. Crit Care. 2020.

. 2020 Feb 6;24(1):40.

doi: 10.1186/s13054-020-2757-2.

¹ Department of oncology, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, People's Republic of China.
² Department of colorectal surgery, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, People's Republic of China. chtgao@wmu.edu.cn.

No abstract available

Conflict of interest statement

The authors declare that they have no competing interests.

New-onset atrial fibrillation and associated outcomes and resource use among critically ill adults-a multicenter retrospective cohort study.
Fernando SM, Mathew R, Hibbert B, Rochwerg B, Munshi L, Walkey AJ, Møller MH, Simard T, Di Santo P, Ramirez FD, Tanuseputro P, Kyeremanteng K. Fernando SM, et al. Crit Care. 2020 Jan 13;24(1):15. doi: 10.1186/s13054-020-2730-0. Crit Care. 2020. PMID: 31931845 Free PMC article.

1. Fernando SM, Mathew R, Hibbert B, Rochwerg B, Munshi L, Walkey AJ, et al. New-onset atrial fibrillation and associated outcomes and resource use among critically ill adults—a multicenter retrospective cohort study. Crit Care. 2020;24:15. doi: 10.1186/s13054-020-2730-0. - DOI - PMC - PubMed
1. Lévesque LE, Hanley JA, Kezouh A, Suissa S. Problem of immortal time bias in cohort studies: example using statins for preventing progression of diabetes. BMJ. 2010;340:b5087. doi: 10.1136/bmj.b5087. - DOI - PubMed
1. Zhang Z. Model building strategy for logistic regression: purposeful selection. Ann Transl Med. 2016;4:111. doi: 10.21037/atm.2016.02.15. - DOI - PMC - PubMed
1. Zhang Z, Reinikainen J, Adeleke KA, Pieterse ME, Groothuis-Oudshoorn CGM. Time-varying covariates and coefficients in cox regression models. Ann Transl Med. 2018;6:121. doi: 10.21037/atm.2018.02.12. - DOI - PMC - PubMed
1. Lu B. Propensity score matching with time-dependent covariates. Biometrics. 2005;61:721–728. doi: 10.1111/j.1541-0420.2005.00356.x. - DOI - PubMed