In major depressive disorder, most treated episodes last about what duration, and what is the relapse risk after multiple episodes?

• A. Most treated episodes last about 3 months; untreated episodes last 6–12 months; relapse risk 50% after 1 episode, 75% after 2, 95% after 3+.
• B. Most treated episodes last about 6 months; untreated episodes last 1–2 months; relapse risk 20% after 1, 40% after 2, 60% after 3+.
• C. Most treated episodes last about 1 month; untreated episodes last 2–3 months; relapse risk 10% after 1, 20% after 2, 40% after 3+.
• D. Most treated episodes last about 2 weeks; untreated episodes last 1 month; relapse risk 5% after 1, 15% after 2, 25% after 3+.

Answer: (A)