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. 2017 Feb 27;2017:2310382. doi: 10.1155/2017/2310382

(a).

Placebo statistic PSQI Quality of sleep
POD1 (Scale 0–3)
Quality of sleep
POD2 (Scale 0–3)
(n) 12 12 12
Mean 7.333 1.333 1.000
Variance (n − 1) 18.970 0.424 0.727
Standard deviation (n − 1) 4.355 0.651 0.853