The Health Improvement Network (THIN) research team

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Missing data in electronic health records

This Stata program uses the two-fold fully conditional specification (FCS) algorithm to impute missing values in longitudinal databases.

twofold.ado  (right-click on 'twofold.ado' and select 'save link as' to download the file and save as an .ado file)

twofold.sthlp (right-click on 'twofold.sthlp' and select 'save link as' to download the file and save as an .sthlp file)

We wrote a manuscript describing the 'twofold' command entitled "Application of multiple imputation using the two-fold fully conditional specification algorithm in longitudinal clinical data". Stata journal accepted this manuscript for publication. To view a pre-publication copy of this manuscript please click here.

To give feedback, please contact Cathy Welch (catherine.welch@ucl.ac.uk) or Irene Petersen (i.petersen@ucl.ac.uk).

We will add more information to this website in due course.