[EpiData-list] Date range selection for age calculation

Dear Epidata team friends, I have two American date format variables. DOB is date of birth of baby and WDATE is date of weighing the baby for the growth monitoring.

I used to write the following statement to calculate the age in months in EPI6

Define age ### Let age=(WDATE – DOB)/30.44

That does not work in EPI ANALYSIS

I tried the statement; Let age= (date(“WDATE”,”mdy”) - date(“DOB”,”mdy”))/30.44 The error message was; Data type mismatch

Please help.

Shavinder Singh