3 Statistical Analysis
Based on previously published data (10, 11), there are
about five factors——gender, height, weight, BMI, BSA——related to
the diameter of the distal radial artery. We calculated an effective
sample size according to 10 events per independent variable principle(12).
Normally distributed continuous variables were expressed as mean ±
standard deviation (SD), if they were normally distributed and compared
using the independent-samples t-test. Abnormally distributed continuous
variables were expressed as median (interquartile range (IQR)), and
compared using the independent-samples nonparametric test. Categorical
variables were expressed as frequency (percentage) and compared using
the Chi-square test. Univariate and multivariate analyses were performed
by logistic regression. Statistical analysis was performed using the
SPSS 26.0 software (IBM, Armonk, NY, USA). P < 0.05 was
considered statistically significant.