I'm using SPSS for binary logistic regression. The result showed that one of the variables has a large beta coefficient and standard error.

Here are some results:

enter image description here

Can some explain to me what is the reason for that?

additional info: the variable that have large beta coefficient and standard error are actually part of the categorical of age (i.e. age were being divided into 4 categories (e.g. 20-25, 26-30 etc). So in this regression binary is being used for 3 of the categories and 1 become the reference.


closed as off-topic by kjetil b halvorsen, Peter Flom May 16 at 12:03

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    $\begingroup$ Are all your variables standardized? Otherwise we can't really say anything about the scale of the coefficient estimates without further details. $\endgroup$ – Firebug Nov 25 '16 at 10:47
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    $\begingroup$ You should post (much) more details, but also search this site for Hauck Donner. $\endgroup$ – kjetil b halvorsen Nov 25 '16 at 11:10
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    $\begingroup$ Or if you cannot understand the answers for Hauck Donner as @kjetilbhalvorsen suggested try searching for separation $\endgroup$ – mdewey Nov 25 '16 at 12:01
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    $\begingroup$ Have you followed up on either my suggestion or that of @kjetilbhalvorsen $\endgroup$ – mdewey Nov 25 '16 at 16:33
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    $\begingroup$ So show us a table of the response variable versus the age categories? $\endgroup$ – kjetil b halvorsen Nov 25 '16 at 16:36