Missing covariate data in clinical research: when and when not to use the missing-indicator method for analysis.

Geahča maid

• Intention to treat analysis in clinical trials when there are missing data.
  Dahkki: Streiner, D, et al.
  Almmustuhtton: (2001)
• Comparison of imputation methods for handling missing covariate data when fitting a Cox proportional hazards model: a resampling study.
  Dahkki: Marshall, A, et al.
  Almmustuhtton: (2010)
• The effect of missing values for covariates.
  Dahkki: Whitlock, G, et al.
  Almmustuhtton: (2002)
• Missing covariate data in the construction of prognostic models: A review of current approaches
  Dahkki: Burton, A, et al.
  Almmustuhtton: (2003)
• Missing data.
  Dahkki: Altman, D, et al.
  Almmustuhtton: (2007)