get_pattern_groups function

Determine patients missingness group

Takes a design matrix with multiple rows per subject and returns a dataset with 1 row per subject with a new column pgroup indicating which group the patient belongs to (based upon their missingness pattern and treatment group)

get_pattern_groups(ddat)

Arguments

• ddat: a data.frame with columns subjid, visit, group, is_avail

Details

• The column is_avail must be a character or numeric 0 or 1