## How do I interpret an Odds Ration of .000 (.00-.)???

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Natalie_in_Amsterdam
Posts: 2
Joined: Tue Dec 13, 2011 1:10 pm

### How do I interpret an Odds Ration of .000 (.00-.)???

Hi,

I have do a result of an OR of .000 in a multiple logistic regression .

Does this simply mean that there is no difference between the reference group and the group for which I got the OR .000? The CI is (.000-.) how do I report that?

I did a quick search to see how other people reported similar results - I found the following interpretation "odds ratio of 0.00 indicates a 0 incidence rate in the protocol group." However there is one case that had a 1 for my dependent variable for the category which got the OR .000 - so I don't think this is right. Any ideas?

Natalie
statman
Posts: 2760
Joined: Tue Jun 12, 2007 12:08 pm
Location: Florida, USA

### Re: How do I interpret an Odds Ration of .000 (.00-.)???

Yes

Also take a look at the Help & Case studies as well as the Note below
See the note below

Statman
Statistical Services
Natalie_in_Amsterdam
Posts: 2
Joined: Tue Dec 13, 2011 1:10 pm

### Re: How do I interpret an Odds Ration of .000 (.00-.)???

Thanks for the quick feedback. I assume the 'yes' means that I was right in my interpretation. I still don't know how to report the CI however.

Apologies for the previous lack of details provided.

1. Version of SPSS = SPSSInc/PASWStatistics18
2. Dependent variable = if a patient has appointed a health-proxy decision maker (0=no, 1=yes) the independent variable is cause of death - I split the file by country. The result I am getting from Spain is the the OR of patients who died with stroke is 0.000. I looked at the cases and I have one patient from Spain who died from stroke and who had a health-proxy decision maker.
3. I searched the topics the OR=0.00 but just got a lot of posts about ORs in general.

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