Statistical analysis
Continuous data were presented as mean and standard deviation within the
normal range. These data were analyzed using student’s and independent
sample t -test or Mann–Whitney U test. Meanwhile, categorical
variables were expressed as counts and percentages, and they were
analyzed using chi-square test or Fisher’s exact test. Univariate and
multivariate logistic regression analyses were conducted to determine
the risk factors for SCI after MICS. A P value ≤0.05 was considered
statistically significant. Statistical analysis was conducted using the
Statistical Package for the Social Sciences software version 25.0 (IBM,
NY).