https://orcid.org/0000-0003-1138-6757
Figures & data
Figure 1 Flow chart of the selection process for the final patient sample used in this study.
Notes: We selected 3139 patients with a primary diagnosis of TCM from the 2016 and 2017 NIS database using the ICD-10-CM of I5181. All eligible patients were divided into two groups based on whether they had the diagnosis of COPD; 684 patients were in the COPD group and 2455 in the non-COPD group. After the propensity score matching in a target ratio of 1:2, 678 COPD patients and 1070 non-COPD patients remained. We then compared inpatient outcomes between two groups.
Abbreviations: TCM, takotsubo cardiomyopathy; COPD, chronic obstructive pulmonary disease; ICD-10-CM code, Tenth Revision, Clinical Modification Code.
Table 1 Baseline Characteristics
Figure 2 Standardized mean differences of covariates before and after propensity score matching between TCM patients with COPD and TCM patients without COPD.
Notes: Standardized mean difference is used to examine the balance of the covariate distribution between the matched COPD group and the non-COPD group. All standardized mean differences of covariate distributions in this study were less than 0.1, which was considered balanced.
Abbreviations: TCM, takotsubo cardiomyopathy; COPD, chronic obstructive pulmonary disease; DM, diabetes mellitus; OSA, obstructive sleep apnea; CKD, chronic kidney disease.
Table 2 In-Hospital Outcomes and Complications