-- No Risk
-- Low Risk
-- High Risk
Brant test indicated need for ordered logit approach, so I am using gologit2 for the analysis. I've consulted the documentation on gologit2 and read Dr. William's materials as well, and attempted an interpretation of the output, but I want to be sure I am making the right contrasts/comparisons appropriately:
Here is my command and output, and my interpretation follows:
Code:
set more off gologit2 cardiorisk age i.sex i.fam_hist yrsusa /// i.lowcarb i.friends_sameethnic educ i.friends_risk /// , auto lrforce ------------------------------------------------------------------------------ Testing parallel lines assumption using the .05 level of significance... Step 1: Constraints for parallel lines imposed for age (P Value = 0.6247) Step 2: Constraints for parallel lines imposed for i.fam_hist (P Value = 0.4300) Step 3: Constraints for parallel lines imposed for i.sex (P Value = 0.3468) Step 4: Constraints for parallel lines imposed for yrsusa (P Value = 0.2823) Step 5: Constraints for parallel lines are not imposed for educ (P Value = 0.00081) i.lowcarb (P Value = 0.00543) i.friends_sameethnic (P Value = 0.00227) i.friends_risk (P Value = 0.01911) ------------------------------------------------------------------------------ Generalized Ordered Logit Estimates Number of obs = 496 --------------------------------------------------------------------------------------- cardiorisk | Coef. Std. Err. z P>|z| [95% Conf. Interval] ----------------------+---------------------------------------------------------------- none | educ | .0267677 .0509569 0.53 0.599 -.073106 .1266415 | lowcarb | .9560091 .2417372 3.95 0.000 .4822129 1.429805 | friends_sameethnic | .1248707 .392147 0.32 0.750 -.6437233 .8934647 age | .0193308 .0113127 1.71 0.087 -.0028417 .0415033 sex_female | -.2504234 .195122 -1.28 0.199 -.6328555 .1320088 fam_hist | .6090692 .1892519 3.22 0.001 .2381422 .9799962 yrsusa | -.8336397 .3744464 -2.23 0.026 -1.567541 -.0997383 _cons | -1.148632 .9356265 -1.23 0.220 -2.982427 .6851618 ----------------------+---------------------------------------------------------------- low | friends_risk | 2.038412 .3153763 6.46 0.000 1.420285 2.656538 age | .0193308 .0113127 1.71 0.087 -.0028417 .0415033 sex_female | -.2504234 .195122 -1.28 0.199 -.6328555 .1320088 fam_hist | .6090692 .1892519 3.22 0.001 .2381422 .9799962 yrsusa | -.8336397 .3744464 -2.23 0.026 -1.567541 -.0997383 | _cons | -.3649326 .9573218 -0.38 0.703 -2.241249 1.511384 =======================================================================================
Constrained Factors - Interpretation
- Higher cardiovascular risk perception is higher for those with a family history of cardiovascular illness
- By contrast, lower risk perception associated with increasing US residence
Unconstrained Factors (No Risk vrs Low/High Risk) - Interpretation
- Eating low carb diet is associated with having NO risk perception, compared to having at least (low + high) risk perception
Unconstrained Factors (No+Low vrs High Risk) - Interpretation
- a persons self-perceived cardio risk is associated that of their friends: having friends who are similarly
perceived as having lower risk perception (none + low) compared to high, tends to positively influence one's risk perception.
I would very much appreciate some thoughts on whether i am interpreting this output correctly, particularly with regard to the comparisons between the various categories of the DV.
Sincerely, cY
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