Hi,
I am resending this query if somebody could help with, I sent it yesterday but did not get any response.
Adding further my query given below, my dependent variable is count (0-9) based on certain scale, i mean the dependent variable measure counts of 9 items for each individual, these counts are given in the table as:
d_cap |
| Freq. Percent Cum.
------------+-----------------------------------
0 | 449 38.71 38.71
1 | 214 18.45 57.16
2 | 163 14.05 71.21
3 | 112 9.66 80.86
4 | 89 7.67 88.53
5 | 56 4.83 93.36
6 | 41 3.53 96.90
7 | 18 1.55 98.45
8 | 12 1.03 99.48
9 | 6 0.52 100.00
------------+-----------------------------------
Total | 1,160 100.00
Can we fit a regression model with negative binomial distribution?
How can we compute the Incident rate ratio?
--- On Tue, 9/1/09, Muhammad Riaz <[email protected]> wrote:
> From: Muhammad Riaz <[email protected]>
> Subject: Negative binomial regression and Incident rate ratio(IRR)
> To: [email protected]
> Date: Tuesday, September 1, 2009, 3:22 PM
> Dear All,
> I am trying to fit a model for count data using Negative
> binomial regression, it gives incident rate ratios for the
> variables in the model, one of the options for this type of
> model is specifying the offset variable while fitting the
> model in stata using glm. This offset should be the person
> years (if i am correct). however I do not have data on this
> variable. My question is:
>
> Is it correct to fit the model without an offset and would
> the Incident rate ratio be still correct to report If I do
> not specify the offset variable in the model?
>
> I will really appreciate any help.
>
> Thank you,
>
> M Riaz
>
>
>
>
>
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