| Type of studies |  | |
---|---|---|---|
Characteristics reported | Trials | Observational studies | All studies |
 | N (%)* | N (%)* | N (%)* |
 | (n = 73) | (n = 30) | (n = 103) |
Variables imputed | Â | Â | Â |
Variables imputed specified/available | 61 (84) | 28 (93) | 89 (86) |
Number of variable(s) imputed | Â | Â | Â |
   1 | 31 | 8 | 39 |
   2 | 9 | 7 | 16 |
   >2 | 17 | 10 | 27 |
   Uncleara | 4 | 3 | 7 |
Outcome variable imputed | Â | Â | Â |
   Yes | 55 (75) | 9 (30) | 64 (62) |
   Not stated | 12 (16) | 2 (7) | 14 (14) |
   No | 6 (8) | 19 (63) | 25 (24) |
Type of outcome variable imputed | Â | Â | Â |
   Numerical | 31 | 6 | 37 |
   Categorical | 16 | 2 | 18 |
   Numerical and categorical | 8 | 1 | 9 |
Number of imputed outcome variables | Â | Â | Â |
   1 | 30 | 6 | 36 |
   2 | 10 | 1 | 11 |
   >2b | 12 | 2 | 14 |
   Uncleara | 3 | 0 | 3 |
Covariate imputed | Â | Â | Â |
   Yes | 13 (18) | 21 (70) | 34 (33) |
   Not stated | 12 (16) | 2 (7) | 14 (14) |
   No | 48 (66) | 7 (23) | 55 (53) |
Type of covariates imputed | Â | Â | Â |
   Numerical | 6 | 4 | 10 |
   Categorical | 3 | 8 | 11 |
   Numerical and categorical | 3 | 8 | 11 |
   Uncleara,c | 1 | 1 | 2 |
Number of imputed covariates | Â | Â | Â |
   1 | 6 | 3 | 9 |
   2 | 2 | 7 | 9 |
   >2 | 5 | 8 | 13 |
   Uncleara | 1 | 3 | 4 |