But I have one question first.

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What is the difference between intensive outpatient (involving group/individual therapy 5 days a week for several hours), and weekly sessions (once a week for a couple of hours)?

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Is one more effective than the other? 

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I have heard differing opinions - some say that BPD needs long and drawn-out maintenance for DBT to work, but after calling the intensive outpatient centre they said that the success rates were extremely high.

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Is anyone able to clarify which might be better or more applicable for certain BPD sufferers?