I don't need a study, as expressed in a previous thread by multiple members its really awfully simple. But like most mental issues drs dont know shyt so they perform longwinded studies trying to convince us they understand.... yeah, no, I'm not in your study am I?

Basics they have in common?
Erratic (extreme) mood shifts and impulse control problems.

Basic differences;
BP ~ episodic mood shifts may or may not have triggers. Independent of environmental factors. i.e. I will be depressed whether or not my bf shows up, I will be manic whether or not my boss approves.

~ Meds, lifestyle changes and therapy are generally helpful

BPD ~ reactionary mood shifts. Always a reaction to someone else, the closer the relationship, the bigger and badder the reaction.
i.e. I hate my bf right now becoz he's busy and I'm slicing my arm becoz I'm obviously unimportant, then bf drops in for a suprize visit and I'm over the moon and more inlove than ever.

~ Unless meds cause flat effect to help you through a rough time, they're generally useless longterm because its your thought patterns and perceptions that need rectifying.

So my 2c? Drs misdx because they're either lazy, cop-out due to insurance issues or they just suck at listening. Because it REALLY isn't that complicated to understand if the right people are asking the right questions... Or maybe they're just bored and are looking to pass the time with studies.