Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
R packages used in the study
| Package | Statistical analysis |
| LASSO, least absolute shrinkage and selection operator. | |
| Glmnet (Version 2.0−10, 2017.05.05) | LASSO and multivariate logistic regression |
| Rms (Version 5.1−2, 2018.01.06) | Nomogram construction |
| pROC (Version 1.10.0, 2017.06.10) | Comparisons between C-indexes |
| Nricens (Version 1.5, 2017.11.22) and PredictABEL (Version 1.2−2, 2014.12.20) | Hosmer-Lemeshow test and calibration curves |
| Rmda (Version 1.4, 2017.07.28) | Decision curve analysis |
