Converting Date or birth to Age

[Dayachund Bundhoo]

Hello,
It's first time I am using this forum. I have previously converted successfully date of birth (dob) to age; most of the time the dob was string. I have now a dob variable which is of the type "numeric daily date (int)", and the format is as follows 5/15/2009 (for May 15, 2009), 6/8/82 (for June 8, 1982), etc. I have tried to convert this dob to stata date (in string format) before converting to age, but am stuck. Grateful for your help. Thanks. Daya

[Rich Goldstein]

Stata dates are not strings; it sounds like you already have what you probably want; please read

help datetime

I also suggest you read the forum FAQ which has good advice on how to ask questions and how to show example data

[Nick Cox]

Suppose you want age at 31 December 2019. Then in many fields this approximation is deemed good enough.

gen age = (mdy(12, 31, 2019) - dob) / 365.25

For daily date variables, the display format is immaterial to this problem. It is the use of a numeric storage type holding daily dates relative to 1 January 1960 (which isn't best called a format).

[Dayachund Bundhoo]

Thank you Rich and Nick. The command from Nick worked very well!
Thanks again.