Opining on childhood bipolar disorder
Obviously it’s overdiagnosed, then, right?
Our non-experts don’t seem to have read that study carefully; if they did, they could answer this question: What was the absolute rate of childhood bipolar disorder in 1995?
What is a 40-fold increase? 0.4%.
When you start from practically nothing, and then diagnose a fraction of one percent of children with a diagnosis – is that overdiagnosis?
What is the “true” rate of bipolar disorder in children? Based on our best epidemiological data, using standard DSM-IV criteria, the National Comorbidity Survey found that about 25% of all adult cases of bipolar disorder began before age 17, with 10% occuring before age 10. The lifetime rate was 5.1%. What’s 10% of 5.1%?
So 0.5% of children and adolescents are diagnosable with bipolar disorder.
Now, is it overdiagnosis when 0.4% are diagnosed with a condition that occurs in 0.5% of the population?
This blogger strongly recommend’s Dr. Kaplan’s blog based on the faith that God and Nature allow 1.9% of 13 year-olds to have bipolar disorder (based on the National Comorbidity survey adolescent population epidemiological study), but zero percent of 12 year-olds. I wonder what day of the year it is in which the switch is suddenly allowed metaphysically? Readers can see my replies to this unscientific belief-system on that blog.