# Linearly interpolate values

Check this option to add values for all missing time points. This option creates a value for every subject at every time point, so subjects do not disappear at the beginning or at the end of the time range.

### How are missing values interpolated?

For any subject in the trial:

Missing values for time points occurring... | Are...
before the time point at which the first observed value was taken | set equal to the first observed value
in between two observed points | linearly interpolated between the two flanking observations
after the time point at which the last observed value was taken | set equal to the last observed value

### To Specify This Option:

| 8 | Check the box.