Method used to deal with missing data | Frequency of use in RCTs in: | |||
---|---|---|---|---|
Alzheimer’s disease (n = 47) | Parkinson’s disease (n = 31) | |||
n | % | n | % | |
Complete-case analysis | 14 | 30 | 11 | 35 |
Survival analysis | 3 | 6 | 10 | 32 |
Last observation carried forward | 16 | 34 | 6 | 19 |
Mixed model | 18 | 38 | 4 | 13 |
Data imputation | 7 | 15 | 4 | 13 |