Re: st: ltable for repeated events

[Sowmya Rajan <sowmya.vrajan@gmail.com>]

Thanks for the suggestions! I'll try to see if I can figure this out.

Sowmya.

On Mon, Sep 20, 2010 at 10:28 AM, Steve Samuels <sjsamuels@gmail.com> wrote:
> As far as I know, there is no command that will do this. You will have
> to construct the tables in a do-file, and I have no example to show
> you. Before starting out, be sure to read
> http://www.stata.com/support/faqs/stat/stmfail.html.
>
> There might well be published examples that you can imitate. A quick
> Google search found:
> http://library2.usask.ca/theses/available/etd-12192007-232441/unrestricted/ghosh_s.pdf;
> see especially Chapter 5.
>
> Assuming that you want something more:
>
> How you would set up each table depends on whether your events are of
> the same or different types and whether you consider them unordered or
> ordered. I would guess yours are ordered. In that case, you have to
> decide on the method for your analysis, as outlined in Section 3.2 of
> the FAQ page. You might want one table for each order (1st, 2nd, 3rd
> occurrence), but the start time might or might not be zero. You also
> have to decide on the quantities to appear in the table. The minimum
> would be: number at risk at each time point, number of events (of
> possibly different types, including exits), and the rates of these
> event. If you show cumulative probabilites, they should appropriate to
> the table you have created. For example, you might show probabilities
> for time to the 1st, 2nd, 3rd events, starting from entry or from the
> time of the previous event (or both!).
>
> This discussion assumes that no individual experiences more than one
> event at a time point. If your data are not discrete, but are grouped
> (took place within intervals, with unknown order of events within
> intervals ), then I suggest that you estimate the proportion of
> individuals with at least one event, perhaps the proportion with 2+
> events, and the average event rate (events/person-time).
>
> In short, with multiple failure data, you have fundamental choices to
> make, and the tables you create should reflect those choices.
>
>
> Steve
>
> Steven J. Samuels
> sjsamuels@gmail.com
> 18 Cantine's Island
> Saugerties NY 12477
> USA
> Voice: 845-246-0774
> Fax:    206-202-4783
>
> On Sun, Sep 19, 2010 at 9:43 PM, Sowmya Rajan <sowmya.vrajan@gmail.com> wrote:
>> Hi,
>> I'm working on discrete-time event history modeling for a case of
>> repeated events (multiple episodes). I'd like to construct life tables
>> by age and race using this data on multiple episodes per respondent.
>> As far as I can see, the STATA command for life tables is ltable;
>> unfortunately, I don't think this command is set up for repeated
>> events. I am sort of stuck here, since I am not able to find the
>> appropriate code for drawing up a life table for repeated events. I
>> was wondering if there is a specific way/ code/ command to handle
>> this, and would really appreciate any help/ advice you may have in
>> this regard.
>>
>> Thanks!
>> Sowmya Rajan.
>>
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