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Young Mania Rating Scale (YMRS) item scores for patients assigned to blue‐blocking (BB) glasses (n = 12; one dropout on day 1) or clear glasses (placebo) (n = 11; three dropouts on days 1, 5, and 6, respectively). Values are reported as means with 95% confidence intervals (CIs). Items 5, 6, and 9: scale range 0–8 points; for other items, scale range 0–4 points.
