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Median values for sleep latency at baseline and at Weeks 1 through 4. Median sleep latency (baseline; Week 1 through 4) were obtained in elderly patients receiving eszopiclone 1 mg (A) or 2 mg (B) and in nonelderly patients receiving eszopiclone 2 mg (C) or 3 mg (D). *P < 0.001 versus baseline for all treatment groups at all time points.
