Calculating age from DOB and interview date

[Talia Sherrard]

Hello,

I have date variables in several formats: patients DOB in format 01/01/70, and interview date in format 01Jan1970.

I was hoping to get some recommendations in options/packages for using these data to calculate age at time of interview.

Any help would be very much appreciated, thank you.

[Nick Cox]

The term format here is ambiguous without a proper data example such as we ask you to give. Please follow https://www.statalist.org/forums/help#stata

It could mean anything from string variables that are literally as you state to numeric date variables with a display format.

Once you have numeric daily date variables, everything is easy given functionality fairly recently added and documented under

help datetime functions 

As a user of Stata 17 you should not need to install any community-contributed packages.