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    1. 22.3 per cent (−10.7; 95% CI, −15.6 to −5.7) in the diet group

      Interesting that the diet group worked better. I'd like to see if it's statistically significantly better than the drug group. It's also worth asking whether sodium was the only important dietary change, or if avoiding sodium caused many other dietary improvements.

    2. Sleepiness and neck circumference were significantly reduced only in the diet group (p = .007 and p < .001 for the time × group interactions, respectively).

      Fascinating. Neck circumference suggests that sodium intake may indeed be the significant dietary factor. The recommended diet wasn't even very restricted in sodium.