Thank you for your reply and suggestions. I understand that the type III test is comparing "globaly" the levels of BMI_catn with each other and a significant result there means that there is at least one pair of levels of bmi_catn are not equal. I also understand that when I'm comparing the odds for levels of bmi_catn to level 2, that's not all the comparisons and one or more of these (in this case 3) comparisons can be non-significant. But I have done pairwise comparisons for all 6 different levels and in this case none were significant. And that's a contradiction. I believe the difference is being caused by how SAS is parameterizing the model for type III test and for LS Means. I think in the case of type III global test, SAS is comparing the levels of bmi_catn at energy = 0. But for LS Means, sas is evaluating the levels of bmi_catn at the mean of energy. by centering the variable energy, I got the two tests to agree: that is there are at least two levels of bmi_catn that have different odds for the outcome variable.
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