On 2015 Nov 18, Diana Petitti commented:

Reviewing articles about vitamin D and falls, I discovered that, while the abstract states that this was a randomized, placebo-controlled trials of vitamin D to prevent falls, all subjects were prescribed 600 mg of elemental calcium in the form of calcium carbonate (p. 1182). Thus, the trial was a randomized trial of vitamin D plus calcium versus calcium alone.

On 2015 Nov 18, Diana Petitti commented:

Reviewing articles about vitamin D and falls, I discovered that, while the abstract states that this was a randomized, placebo-controlled trials of vitamin D to prevent falls, all subjects were prescribed 600 mg of elemental calcium in the form of calcium carbonate (p. 1182). Thus, the trial was a randomized trial of vitamin D plus calcium versus calcium alone.