Single digit to double digit percentages.
> Among bipolar patients, the real danger is depression, as they will all experience that.
Iirc you don't need depression to fit diagnostic criteria of bipolar I. Just a manic episode will do it.
Depression will lead the sufferer to seek treatment. Mania and psychosis will make their life hell and possibly have them harm others, but they will think they are ok.
I think maybe you haven't been close to a particularly bad case of bipolar I. It can be very similar to schizoaffective disorder or schizophrenia. People can hop around these diagnoses because they can be hard to pin down and professionals can disagree.
> it is usually the first indicator of BPD, leading to diagnosis, education, and treatment.
That's a fairly optimistic scenario. Spoken like someone who has not seen a loved one deny the illness and avoid treatment.
> What are psychotic symptoms in bipolar disorder?
> Psychotic symptoms are sometimes found in people with bipolar disorder, particularly in the manic phase of the illness.. [snip] ..
> Moderate quality evidence suggests the prevalence of visual hallucinations in people with affective psychosis is around 15%, and the prevalence of auditory hallucinations is around 28% [snip. These rates] are higher than general population rates (7%).
https://library.neura.edu.au/bipolar-disorder/signs-and-symp...
This is false, and that was what I meant. BPD is not a psychotic disorder, even if psychotic episodes are possible, they are rare. Schizophrenia is a psychotic disorder, but at a rate of 0.45%, not 1%.