What’s the evidence that there are differences of MADRS across treatment conditions?

Statistics question

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Lam, Raymond W., et al. “Efficacy of bright light treatment, fluoxetine, and the combination in patients with nonseasonal major depressive disorder: a randomized clinical trial.” JAMA psychiatry 73.1 (2016): 56-63.

1. What type of ANOVA did the authors use?
2. What’s the evidence that there is an effect of time on MADRS?
3. What’s the evidence that there are differences of MADRS across treatment conditions?
4. Which treatment appears most effective?