StdBptRs_im_w7_f2 - Search - Sleep Data - National Sleep Research Resource

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Standard deviation of the daily start time of in-bed or rest interval in main sleep over all days from actigraphy

sawa38 under Sleep Monitoring/Actigraphy in HCHS variables

This variable is similar to sawa79; however, sawa38 is calculated based on data generated by Actiware software before data optimization.

Standard deviation of the daily start time of rest period in main sleep over all days from actigraphy

sawa79 under Sleep Monitoring/Actigraphy in HCHS variables

Rest period is the interval between the start and end of the rest interval, used in actigraphy.This variable is similar to sawa38; however, sawa38 is calculated based on data generated by Actiware software before data optimization.

Standard deviation of start time of first rest interval over nighttime periods (hours from midnight)

stdbedtime_act_night under Sleep Monitoring/Actigraphy in SHINE variables

Variable sourced from actigraphy data