Create OBI cohort of locked, complete cases for most analyses

this function does

1. include case ≥2020-01-01 based on infant date of birth

2. include case if case is complete using flg_complete

3. create case_locked varaible using 90 days lock

4. filter to complete and locked cases(limit_to_locked = TRUE)

5. create mdhhs_id character variable with leading 0's

create_obi_cohort(df, limit_to_locked = T)

Arguments

df

Data frame -- usually this is the data frame read into R using data.table::fread

limit_to_locked

Logical -- if TRUE, only return cases that are locked