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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Sleep Med. 2020 Apr 23;73:76–81. doi: 10.1016/j.sleep.2020.04.013

Figure 1.

Figure 1.

Scatterplots showing associations of the global Pittsburgh Sleep Quality Index (PSQI) score with A) Alpha diversity (Shannon’s Diversity Index) and B) Firmicutes/Bacteroidetes ratio. Black dots represent “normal” sleepers, characterized by a global PSQI score between 0–5, whereas white dots represent “poor” sleepers with a PSQI score > 5 [24]. Trendlines consider all data points.