Statistical Analysis
Nominal data were described as numbers and percentages. Continuous data
were assessed for normal distribution (Shapiro-Wilk test) and provided
as the mean ± standard deviation or median
(P25-P75). Quantitative data were
analyzed with the chi-square or Fisher exact test. Continuous variables
were compared between groups by means of the t-test or the Mann-Whitney
nonparametric test, as appropriate. All statistical tests were 2 sided,
with p < 0.05 considered statistically significant. Data
analyses were conducted with the Statistical Package for the Social
Sciences, version 25.0 (IBM SPSS Statistics for Windows, Version 25.0.
Armonk, NY: IBM Corp) and Microsoft Excel version 14.0 (Microsoft
Corporation, Redmond, Washington).