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).