| n (N = 110) | % |
---|---|---|
Type of primary outcome | ||
 Binary | 52 | 47% |
 Continuous | 52 | 47% |
 Count | 4 | 4% |
 Time-to-event | 2 | 1% |
Method of MI | ||
 Not stated | 47 | 43% |
 Multiple Imputation using Chained Equations (MICE/FCS) | 35 | 32% |
  Specified Imputation Model Type(s) within MICE/FCS | 12 | 11% |
MCMC MI/algorithm/method | 8 | 7% |
 Regression based MI | 7 | 6% |
  Specified imputation Model Type within regression based MI | 4 | 4% |
PMM | 5 | 5% |
MVN imputation | 4 | 4% |
MVN imputation (non-monotone missing patterns) and regression MI model (monotone patterns) | 1 | 1% |
MICE (non-monotone missing patterns) and regression MI model (monotone patterns) | 1 | 1% |
MCMC (non-monotone missing patterns) and PMM (monotone patterns) | 1 | 1% |
Propensity score MI | 1 | 1% |
Specified variables in imputation model | 52 | 47% |
 Imputation model incl. All variables in analysis model only | 6 | 5% |
 Imputation model incl. All variables in analysis model + auxiliary variables | 37 | 34% |
 Imputation model did not include all variables in analysis modela | 9 | 8% |
Did not specify variables in imputation model | 58 | 53% |
Imputation model incl. All variables in analysis model + auxiliary variables | 8 | 7% |
Reported the number of multiple imputations | 70 | 64% |
No. of imputations | ||
 5 | 9 | 8% |
 10 | 8 | 7% |
 11–20 | 25 | 23% |
 21–50 | 17 | 15% |
 100 | 8 | 7% |
 200 | 1 | 1% |
 1000 | 2 | 2% |
 Not stated | 40 | 36% |
Specific procedure/command(s) (software) for implementing MI | 26 | 24% |
 IVEware software | 1 | 1% |
 MICE (R) | 3 | 3% |
 Proc MI (SAS) | 3 | 3% |
 Proc MI and Proc MIANALYZE (SAS) | 5 | 5% |
 Proc MIANALYZE (SAS) | 2 | 2% |
 Realcom Impute | 1 | 1% |
 Ice (Stata) | 2 | 2% |
 MICE (Stata) | 1 | 1% |
 Mi impute (Stata) | 5 | % |
 MI impute and mi estimate (Stata) | 1 | 1% |
 Missing data module in SPSS 24b | 2 | 2% |
 Not stated | 84 | 76% |
Rubin’s rules used for inference | ||
 Yesc | 25 | 23% |
 Nod | 1 | 1% |
 Not stated | 84 | 76% |
Analysis status | ||
 Primary | 2 | 13% |
 Sensitivity | 14 | 87% |
Performed diagnostic check of imputations | 1 | 1% |