Skip to main content
. 2020 Sep 14;180(12):1694–1696. doi: 10.1001/jamainternmed.2020.2834

Figure 1. Sleep Duration in the Study Cohort.

Figure 1.

A, Distribution of the mean sleep duration of all 120 522 individuals in the data set. Individuals had to have at least 100 days of sleep data with at least 22 hours of wear time to be included. B, C, and D, The distribution sleep duration for 3 individuals with similar mean sleep duration (6.7-7.3 hours). Their body mass indexes ranged from 27 to 28 and ages ranged from 43 to 79 years. Body mass index is calculated as weight in kilograms divided by height in meters squared.