Variables | Data |
---|---|
Sample size, median (IQR) | Â |
   Development cohortb | 2,562 (1,426 to 4,965) |
   Validation cohortsc | 1,895 (1,253 to 4,398) |
Treatment of continuous risk predictors, n (%) | Â |
   All kept continuous | 13 (30%) |
   All categorised/dichotomised | 21 (49%) |
   Some categorised, some not | 6 (14%) |
   Unclear | 3 (7%) |
Treatment of missing data, n (%) | Â |
   Not mentioned | 16 (41%) |
   Complete case | 21 (54%) |
   Multiple imputation | 1 (3%) |
   Other (for example, surrogate splitter for regression trees) | 1 (3%) |
Model-building strategy, n (%) | Â |
   Stepwise, forward selection, backward elimination | 20 (51%) |
   All significant in univariate analysis | 2 (5%) |
   Other | 12 (31%) |
   Unclear | 5 (13%) |
Overfitting mentioned or discussed, n (%) | 5 (13%) |