Phenomenology and diagnostic stability of paediatric bipolar disorder in a Spanish sample

95.8% of our sample retained a BD diagnosis after a median follow-up period of 3.86 years. BD-I patients maintained their diagnosis and subtype of BD. Half of all patients with baseline BD-NOS maintained their BD subtype, but most of the other half showed conversion to BP-I at follow up. Only 4.2% of the sample (all with BD-NOS at baseline) did not meet criteria for BD at follow up, and these patients were stable.