Matching within certain intervals in the list of matching variables

[Vicky Bajpai]

Hi everyone,
I'm planning to match cases and controls based on age (within 3 years), gender, index date (within 3 years – index date is date of incident treatment prescription). I read about 'psmatch2' and other Stata commands. However, it seems to me that they match with the exact value given in the variable. I'm not sure how can I match within certain interval for a given variable in the list of matching variables.

[Rich Goldstein]

I am not familiar with -psmatch2- but there are user-written routines that allow use of calipers; for matching with replacement, see, e.g., -vmatch- and for matching without replacement, see, e.g., -calipermatch-; use -search- or -findit- to find and install these

[Vicky Bajpai]

Thanks Rich for your suggestion and I'm aware of caliper matching. However, my problem is how can I match individuals within 3 years of their age and within 3 years of index data. Any thoughts from will be appreciated.