Question: Age of Onset and Family Histories of Individuals with Bipolar
Disorder

In their paper “Early Age at Onset as a Risk Factor for Poor Outcome of Bipolar Disorder”, Journal of Psychiatric Research, (2003), Carter et al. one of the relationships examined was that between age of onset (early age < 18, later age > 18) and family history of mood disorders. This paper is linked to the D2L site under categorical data analysis in the outline. Some the results from their study are contained in the files: Bipolar Family.JMP for part (a) and Bipolar Episode.JMP for part(b).

a) Use these data to determine if there is a relationship between age of onset and family history for the population of individuals with bipolar disorder. Summarize your findings. (4 pts.)

b) The researchers also looked at type of episode which was classified as being depression, mania, or hypomania. Is there a relationship between the type of episode and age of onset? Summarize your findings. Note: this outcome was not recorded or missing for some of the patients in the study. (4 pts.)