Statistical analysis.
COMPLICATIONS
Statistical analysis was performed using R software (version 4.0.5; R Foundation for Statistical Computing, Vienna, Austria). The gganatogram package was used for anatogram plotting; the qgraph, bootnet, and igraph packages were used for network analysis and the Spinglass algorithm; the rms package was used for nomogram and calibration curve plotting; and the survival and survminer packages were used for survival analysis. The association between the isolated complications was assessed using Spearman’s correlation. Survival analysis was assessed by Kaplan–Meier curves via log-rank tests. 