Table 3 The characteristics of each variable used to randomise split by covariate inclusion in the analysis
Variable characteristics | Covariate not in analysis (n = 168) | Covariate included in analysis (n = 479) | |
|---|---|---|---|
Variable typea | Binary | 45 (27) | 194 (41) |
Categorical (Ordinal) | 5 (3) | 38 (8) | |
Categorical (Non-Ordinal) | 100 (59) | 126 (26) | |
Continuous | 18 (11) | 121 (25) | |
Variables form in randomisation if continuous | Binary | 9 (50) | 90 (74) |
Categorical | 5 (28) | 26 (22) | |
Unknown | 4 (22) | 5 (4) | |
Number of categories b | 2 | 59 (35) | 304 (64) |
3 | 16 (9) | 64 (13) | |
4 | 10 (6) | 20 (4) | |
5 +  | 72 (43) | 77 (16) | |
Unknown | 11 (7) | 14 (3) | |
Median (IQR) | 3 (2, 17) | 2 (2, 3) | |
Mean (SD) | 29 (77) | 6 (17) | |