Table 3 Description of multivariable statistical techniques used in 226 studies
From: A focused review of statistical practices for relating radiation dose-volume exposure and toxicity
Characteristic | N (%) of 226 |
|---|---|
Variable selection strategy | |
 Forward selection | 114 (50.4) |
 Backward elimination | 32 (14.2) |
 Bidirectional | 9 (4.0) |
 Entry method | 16 (7.1) |
 Other | 13 (5.8) |
 Not stated | 42 (18.6) |
Method of multicollinearity assessment | |
 Pearson and/or Spearman correlation | 45 (19.9) |
 Assumption of multicollinearity | 36 (15.9) |
 Other | 27 (11.9) |
 Not addressed | 118 (52.2) |