Author Correction: Validation of the Sleep Regularity Index in Older Adults and Associations with Cardiometabolic Risk (Scientific Reports, (2018), 8, 1, (14158), 10.1038/s41598-018-32402-5)

The Article contains an error in Equation 3.(formula presented)Additionally, the Article contains a typographical error in the Methods section under subheading ‘Calculation of Sleep Regularity Index (SRI) and other sleep indices’ where, “Sleep midpoint, our index of sleep timing, was calculated as a mean of circular quantities (appropriate for time of day) using the following equation (3), where tj denotes time of day in minutes at epoch j:” should read: “Sleep midpoint, our index of sleep timing, was calculated as a mean of circular quantities (appropriate for time of day) using the following equation (3), where tj denotes time of day in minutes at epoch j, and arctan2(x, y) denotes the angle between (x, y) and the positive x-axis.”