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. Author manuscript; available in PMC: 2018 Aug 1.

Published in final edited form as: J Affect Disord. 2017 Apr 19;217:299–305. doi: 10.1016/j.jad.2017.04.030

Bland-Altman Plots presenting the mean difference values of the Fitbit Flex (FBF) and the Actiwatch-2 (AW-2) on the Y-Axis against the mean average values of the Fitbit Flex (FBF) and the Actiwatch-2 (AW-2) on the X-Axis (Krouwer, 2008) across Total Sleep Time (TST; minutes), Sleep Onset Latency (SOL; minutes), Wake After Sleep Onset (WASO; minutes), and Sleep Efficiency (SE; percent). Horizontal, solid red line denotes the average mean difference with dotted lines representing 95% confidence interval. Figure A presents the normal netting (FBF-N) vs. PSG. Figure B presents the sensitive setting (FBF-S) vs. PSG.

Bland-Altman Plots presenting the mean difference values of the Fitbit Flex (FBF) and the Actiwatch-2 (AW-2) on the Y-Axis against the mean average values of the Fitbit Flex (FBF) and the Actiwatch-2 (AW-2) on the X-Axis (Krouwer, 2008) across Total Sleep Time (TST; minutes), Sleep Onset Latency (SOL; minutes), Wake After Sleep Onset (WASO; minutes), and Sleep Efficiency (SE; percent). Horizontal, solid red line denotes the average mean difference with dotted lines representing 95% confidence interval. Figure A presents the normal netting (FBF-N) vs. PSG. Figure B presents the sensitive setting (FBF-S) vs. PSG.