Sentence examples for missing data simulations from inspiring English sources

For those missing data simulations of scenarios (viii) to (xi) we simulated data as described for complete data, except that for each generated meta-analysis we removed the data for the second endpoint in a randomly selected 50% of studies.

For the missing data simulations, the pooled estimate for endpoint j = 2 was of particular interest because of the missing data for this endpoint.

For each dataset and missing data level, average R i 2 and R m 2 across the 10 missing data simulations were also calculated and referred to as R i 2 – and R m 2 –.

Hence the average regression coefficient estimates and associated empirical SE (i.e. the standard deviation of the estimates across simulations) from performing a large simulation study with no missingness involving 20,000 replications formed the true values against which the missing data simulations were compared.

Five missing data simulations were produced from a complete data set to permit this methodological comparison.

The unbalanced MCAR and MAR (Q6, and MAR-age and sex) and MNAR simulations produced similar results to the 10% probability of missing data simulation.

Patients with high observed scores (prior to the missing data simulation) are assigned a lower imputed score that reflects the mean score for that question in the entire population.

For some amounts and patterns of missing data, simulation and empirical studies support the conclusion that its impact can be reduced to tolerable levels [ 37, 38]; for other cases, significant problems remain [ 39- 41].

In order to estimate the effect of missing data, the parametric simulations were repeated with the same amount of missing data present in the nonparametric datasets.

In a more realistic simulation setting involving more input trees, trees of different sizes and different amounts of missing data and sequence simulation, MR performed very well.

Third, we did not consider missing data in the simulation and assumed that non-compliers' outcomes were still collectable.