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. 2019 Sep 25;19(19):4160. doi: 10.3390/s19194160

Figure 3.

Figure 3

Bland–Altman plots of (A) the sleep onset latency (SOL) and (B) wake after sleep onset (WASO) measurements show differences between the PSG gold standard and MB, MW, and SC. The blue horizontal line represents the mean difference between the two measurements, and the shaded blue area represents the 95% CI of the mean difference. Black horizontal lines mark the 1.96 SD from the mean. The black dashed line is the line of equality (difference = 0), and the red dashed line represents the Spearman correlation between the difference and the average of the two measurements. SOL: Sleep onset latency, WASO: wake after sleep onset. MB: Mi Band, MW: MotionWatch and SC: Sleep Cycle application.