Re: st: Matching in STATA

[Andrea Bennett <mac.stata@gmail.com>]

Dear Henry,

Guess I would generate a new dummy variable (for both data sets) for  
the case where you want to merge by age-groups and then merge by this  
new age-group.

Kind regards,

Andrea


On Jun 20, 2008, at 12:38 PM, Henry wrote:


> Dear listers,
> I would like to carry out some matching for a case-control study using
> STATA but its proving to be a bit challenging to me. I have checked
> from achieves but a query close to mine on statlist was not answered
> in 2004. Could there be a way of matching cases to controls within a
> range of values say for age, a 40yr old case-patient can be matched to
> either a 38 or 39 or 40 or 41 or 42yr old control-patient? I have used
> the -merge- command to merge two datasets by sex and age of patients
> but it only works for 40yr old case matching a 40yr old control. For
> this case am still interested in a 1-1  matching but what if I extend
> this to a 1:n match?  I want to have something of this sort:
>
> case-patient                  case-age           sex
> control-patient              control-age
> 1          00b7                            35                    1
>     00YP                           35
> 2          00b7                            35                    1
>     0XC1                           33
> 3          00b7                            35                    1
>     0001                            36
>
> Any suggestions.
> Henry
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