Statistical analysis
Categorical variables were described as frequency (percentage) and
continuous variables as median (interquartile range). Continuous and
categorical variables were compared using Mann-Whitney U test and the
χ2 test respectively. Fisher exact test was used when
the data were limited. Univariate and multivariable logistic regression
models were used to explore the association between NOAF with
in-hospital mortality. A 2-sided α of less than 0.05 was considered
statistically significant. All statistical analyses were performed using
SPSS (Statistical Package for the Social Sciences) software, version
26.0 software (IBM SPSS Statistics).