|Title||Analysis of Longitudinal Outcome Data with Missing Values in Total Knee Arthroplasty.|
|Publication Type||Journal Article|
|Year of Publication||2016|
|Authors||Kang, YGwi, Lee, JTaek, Kang, JYeal, Kim, GHye, Kim, TKyun|
|Date Published||2016 01 01|
|Keywords||Aged, Algorithms, Analysis of Variance, Arthroplasty, Replacement, Knee, Data Collection, Data Interpretation, Statistical, Female, Humans, Longitudinal Studies, Male, Middle Aged, Models, Statistical, Osteoarthritis, Range of Motion, Articular, Research Design, Retrospective Studies, Sample Size, Surveys and Questionnaires|
We sought to determine the influence of missing data on the statistical results, and to determine which statistical method is most appropriate for the analysis of longitudinal outcome data of TKA with missing values among repeated measures ANOVA, generalized estimating equation (GEE) and mixed effects model repeated measures (MMRM). Data sets with missing values were generated with different proportion of missing data, sample size and missing-data generation mechanism. Each data set was analyzed with three statistical methods. The influence of missing data was greater with higher proportion of missing data and smaller sample size. MMRM tended to show least changes in the statistics. When missing values were generated by 'missing not at random' mechanism, no statistical methods could fully avoid deviations in the results.
|Alternate Journal||J Arthroplasty|