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. Author manuscript; available in PMC: 2021 Apr 15.
Published in final edited form as: Lancet Digit Health. 2020 Jan 16;2(2):e85–e93. doi: 10.1016/S2589-7500(19)30222-5

Figure 2: Percentage of participants with weekly data above threshold of the mnaive model (A) and average daily wear time against number of users (B).

Figure 2:

Data are from March 15, 2016, to March 1, 2018. (A) Measurements from 144 360 users from all states were included. Measurements with missing wear time, wear time less than 1000 min/day or missing RHR were excluded, as well as weeks with fewer than four RHR measurements and users with less than 100 total RHR measurements. Model 1 thresholds were used: participants were over the threshold for any given week if they had a sleep time that was greater than 0·5 SD below their overall average and an RHR that was 0·5 SD above their overall average. (B) Measurements from 186 656 users from all states were included. Measurements with missing wear time, wear time less than 1000 min/day, and missing RHR were excluded for this analysis. The sharp downwards spike in wear time in March, 2017, is the result of daylight saving time. RHR=resting heart rate.