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Hispanic Community Health Study / Study of Latinos

Name Label Folder
sawa10
Total number of valid (good) days on weekdays from actigraphy
Total number of valid (good) days on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa100
Standard deviation of daily total sleep period during main sleep on weekdays from actigraphy
Standard deviation of daily total sleep period during main sleep on weekdays from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy
sawa101
Average daily total sleep duration in main sleep on weekdays from actigraphy
Average daily total sleep duration in main sleep on weekdays from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep. This variable is similar to variable sawa36; however, sawa36 is calculated based on data generated by Actiware software before data cleaning and imputation.

Sleep Monitoring/Actigraphy
sawa102
Standard deviation of daily sleep duration on weekdays from actigraphy
Standard deviation of daily sleep duration on weekdays from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa103
Average daily sleep onset latency on weekdays from actigraphy
Average daily sleep onset latency on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa104
Average daily duration of wake after sleep onset (WASO) on weekdays from actigraphy
Average daily duration of wake after sleep onset (WASO) on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa105
Average daily duration of wake after sleep offset (snooze time) on weekdays from actigraphy
Average daily duration of wake after sleep offset (snooze time) on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa106
Average daily duration of wake in bed on weekdays from actigraphy
Average daily duration of wake in bed on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa107
Average daily sleep efficiency on weekdays from actigraphy
Average daily sleep efficiency on weekdays from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
sawa108
Standard deviation of the daily sleep efficiency on weekdays from actigraphy
Standard deviation of the daily sleep efficiency on weekdays from actigraphy

Sleep efficiency is the proportion of sleep duration (i.e. total sleep time, tst) in total rest period (i.e. rest interval) in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep. In this study, rest interval is the same as in-bed period.

Sleep Monitoring/Actigraphy
sawa109
Average sleep maintenance efficiency sleep in main sleep on weekdays from actigraphy
Average sleep maintenance efficiency sleep in main sleep on weekdays from actigraphy

Sleep maintenance efficiency is the ratio between sleep duration (i.e. total sleep time, tst) and sleep period in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep, while sleep period is the interval between sleep onset time and sleep offset time.

This variable is similar to variable sawa34; however, sawa34 is derived from Actiware variable sawa24 before data optimization.

Sleep Monitoring/Actigraphy
sawa11
Total number ofvalid days on weekends from actigraphy
Total number ofvalid days on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa110
Standard deviation of sleep maintenance efficiency in main sleep on weekdays from actigraphy
Standard deviation of sleep maintenance efficiency in main sleep on weekdays from actigraphy

Sleep maintenance efficiency is the ratio between sleep duration (i.e. total sleep time, tst) and sleep period in main sleep. Sleep duration is the interval between sleep onset time and sleep offset time while asleep, while sleep period is the interval between sleep onset time and sleep offset time.

This variable is similar to variable sawa34; however, sawa34 is derived from Actiware variable sawa24 before data optimization.

Sleep Monitoring/Actigraphy
sawa111
Average daily total sleep fragmentation index in main sleep on weekdays from actigraphy
Average daily total sleep fragmentation index in main sleep on weekdays from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
sawa112
Average number of sleep bouts (continuous periods of sleep) between sleep onset and sleep offset in main sleep on weekdays from actigraphy
Average number of sleep bouts (continuous periods of sleep) between sleep onset and sleep offset in main sleep on weekdays from actigraphy

sleep bouts are continuous blocks, one or more epochs in duration, with each epoch of each block scored as "sleep", between the start time and the end time of the given interval.

Sleep Monitoring/Actigraphy
sawa113
Average number of wake bouts (continuous periods of wake) between sleep onset and sleep offset in main sleep on weekdays from actigraphy
Average number of wake bouts (continuous periods of wake) between sleep onset and sleep offset in main sleep on weekdays from actigraphy

Wake bouts is also referred to as "nocturnal awakenings". There are always comparable number of wake bouts to sleep bouts.

Sleep Monitoring/Actigraphy
sawa114
Total number of days with naps on weekdays from actigraphy
Total number of days with naps on weekdays from actigraphy

This is the number of weekdays with at least one nap. This refers to the number of weekdays on which a participant reported taking naps.

Sleep Monitoring/Actigraphy
sawa115
Total number of days with naps of any sleep recorded on weekdays from actigraphy
Total number of days with naps of any sleep recorded on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa116
Total number of days with naps of at least 15 minutes in length on weekdays from actigraphy
Total number of days with naps of at least 15 minutes in length on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa117
Average number of naps in 24 hours on weekdays from actigraphy
Average number of naps in 24 hours on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa118
Average number of naps of any sleep recorded in 24 hours on weekdays from actigraphy
Average number of naps of any sleep recorded in 24 hours on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa119
Average number of naps of at least 15 minutes in length in 24 hours on weekdays from actigraphy
Average number of naps of at least 15 minutes in length in 24 hours on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa120
Average sleep duration per nap on weekdays from actigraphy
Average sleep duration per nap on weekdays from actigraphy

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa121
Average sleep duration per nap in nap of any sleep recorded on weekdays from actigraphy
Average sleep duration per nap in nap of any sleep recorded on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa122
Average sleep duration per nap in naps of at least 15 minutes in length on weekdays from actigraphy
Average sleep duration per nap in naps of at least 15 minutes in length on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa123
Average daily sleep duration in naps on weekdays from actigraphy
Average daily sleep duration in naps on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa124
Average daily sleep duration in naps of at least 15 minutes in length on weekdays from actigraphy
Average daily sleep duration in naps of at least 15 minutes in length on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa125
Average start time of in-bed or rest interval in main sleep on weekdays from actigraphy
Average start time of in-bed or rest interval in main sleep on weekdays from actigraphy

This variable is similar to sawa39; however sawa39 is calculated based on data generated by Actiware software before data optimization.

Sleep Monitoring/Actigraphy
sawa126
Standard deviation start time of in-bed or rest interval in main sleep on weekdays from actigraphy
Standard deviation start time of in-bed or rest interval in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa127
Average daily sleep onset time on weekdays from actigraphy
Average daily sleep onset time on weekdays from actigraphy

This variable is similar to variable SAWA43; however, SAWA43 is calculated based on data generated by Actiware software before data optimization

Sleep Monitoring/Actigraphy
sawa128
Standard deviation of the daily sleep onset time on weekdays from actigraphy
Standard deviation of the daily sleep onset time on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa129
Average daily sleep offset time on weekdays from actigraphy
Average daily sleep offset time on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa130
Standard deviation of daily sleep offset time on weekdays from actigraphy
Standard deviation of daily sleep offset time on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa131
Average daily end time of in-bed or rest interval in main sleep on weekdays from actigraphy
Average daily end time of in-bed or rest interval in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa132
Standard deviation pf daily end time of in-bed or rest interval in main sleep on weekdays from actigraphy
Standard deviation pf daily end time of in-bed or rest interval in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa133
Average daily mid-point of in-bed or rest interval in main sleep on weekdays from actigraphy
Average daily mid-point of in-bed or rest interval in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa134
Standard deviation of the daily mid-point of in-bed or rest interval in main sleep on weekdays from actigraphy
Standard deviation of the daily mid-point of in-bed or rest interval in main sleep on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa135
Average daily mid-point for sleep period on weekdays from actigraphy
Average daily mid-point for sleep period on weekdays from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy
sawa136
Standard deviation of the daily mid-point for sleep period on weekdays from actigraphy
Standard deviation of the daily mid-point for sleep period on weekdays from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy
sawa137
Average whte light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy
Average whte light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa138
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa139
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa140
Average red light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy
Average red light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekdays from actigraphy Sleep Monitoring/Actigraphy
sawa141
Number of weekends with sleep data recorded
Number of weekends with sleep data recorded Sleep Monitoring/Actigraphy
sawa142
Average daily total sleep duration in main sleep and naps combined on weekends from actigraphy
Average daily total sleep duration in main sleep and naps combined on weekends from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa143
Standard deviation of sleep duration in 24 hours (including main rest intervals and naps) on weekends from actigraphy
Standard deviation of sleep duration in 24 hours (including main rest intervals and naps) on weekends from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa144
Average daily rest period in main sleep on weekends from actigraphy
Average daily rest period in main sleep on weekends from actigraphy

Rest period is the interval between the start and end of the rest interval, used in actigraphy.

Sleep Monitoring/Actigraphy
sawa145
Standard deviation of the daily rest period in main sleep on weekends from actigraphy
Standard deviation of the daily rest period in main sleep on weekends from actigraphy

Rest period is the interval between the start and end of the rest interval, used in actigraphy.

Sleep Monitoring/Actigraphy
sawa146
Average daily sleep period on weekends from actigraphy
Average daily sleep period on weekends from actigraphy

This variable is similar to sawa31; however, sawa31 is derived from Actiware variable sawa18 before data optimization.

Sleep Monitoring/Actigraphy
sawa147
Standard deviation of daily sleep period on weekends from actigraphy
Standard deviation of daily sleep period on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa148
Average daily total sleep duration in main sleep on weekends from actigraphy
Average daily total sleep duration in main sleep on weekends from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

This variable is similar to sawa35; however, sawa35 is calculated based on data generated by Actiware software before data cleaning and imputation.

Sleep Monitoring/Actigraphy
sawa149
Standard deviation of daily total sleep duration in main sleep on weekends from actigraphy
Standard deviation of daily total sleep duration in main sleep on weekends from actigraphy

Sleep duration (i.e. total sleep time) is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa150
Average daily sleep onset latency on weekends from actigraphy
Average daily sleep onset latency on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa151
Average daily duration of wake after sleep onset (WASO) on weekends from actigraphy
Average daily duration of wake after sleep onset (WASO) on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa152
Average daily duration of wake after sleep offset (snooze time) on weekends from actigraphy
Average daily duration of wake after sleep offset (snooze time) on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa153
Average daily duration of wake in bed on weekends from actigraphy
Average daily duration of wake in bed on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa154
Average daily sleep efficiency on weekends from actigraphy
Average daily sleep efficiency on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa155
Standard deviation of the daily sleep efficiency on weekends from actigraphy
Standard deviation of the daily sleep efficiency on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa156
Average daily sleep maintenance efficiency sleep in main sleep on weekends from actigraphy
Average daily sleep maintenance efficiency sleep in main sleep on weekends from actigraphy

This variable is similar to variable sawa33; however, sawa33 is derived from Actiware variable sawa24 before data optimization.

Sleep Monitoring/Actigraphy
sawa157
Standard deviation of the daily sleep maintenance efficiency sleep in main sleep on weekends from actigraphy
Standard deviation of the daily sleep maintenance efficiency sleep in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa158
Average daily total sleep fragmentation index in main sleep on weekends from actigraphy
Average daily total sleep fragmentation index in main sleep on weekends from actigraphy

Sleep Fragmentation is an index of restlessness during the sleep period expressed as a percentage. Kristen L et al. 2011 (PubMed ID:21411507)

There are three type of measures for sleep fragmentation: movement Index (MI), fragmentation index (FI), and total sleep fragmentation Index. The fragmentation index refers to the percentage of 60s periods of sleep out of the total number of periods of immobility. The movement index refers to the total of scored awake minutes divided by sleep period (i.e. total time in bed). The total sleep fragmentation index is the sum of FI and MI. (ActiGraph validation reference)[https://actigraphcorp.force.com/support/s/article/Sleep-Fragmentation-Index-Validation-Reference]

Sleep Monitoring/Actigraphy
sawa159
Average number of sleep bouts (continuous periods of sleep) between sleep onset and sleep offset in main sleep on weekends from actigraphy
Average number of sleep bouts (continuous periods of sleep) between sleep onset and sleep offset in main sleep on weekends from actigraphy

sleep bouts are continuous blocks, one or more epochs in duration, with each epoch of each block scored as "sleep", between the start time and the end time of the given interval.

Sleep Monitoring/Actigraphy
sawa16
Average daily duration of rest period in main sleep over all days from actigraphy
Average daily duration of rest period in main sleep over all days from actigraphy

Rest period is the interval between the start and end of the rest interval, used in actigraphy.

This variable is similar to sawa50; however, sawa16 is generated by Actiware software before data optimization.

Sleep Monitoring/Actigraphy
sawa160
Average number of wake bouts (continuous periods of wake) between sleep onset and sleep offset in main sleep on weekends from actigraphy
Average number of wake bouts (continuous periods of wake) between sleep onset and sleep offset in main sleep on weekends from actigraphy

Wake bouts is also referred to as "nocturnal awakenings". There are always comparable number of wake bouts to sleep bouts.

Sleep Monitoring/Actigraphy
sawa161
Total number of days with any naps in the entire actigraphy recording period on weekends from actigraphy
Total number of days with any naps in the entire actigraphy recording period on weekends from actigraphy

This is the number of weekend days that have at least one nap. This refers to the number of weekend days on which a participant reported taking naps.

Sleep Monitoring/Actigraphy
sawa162
Total number of days with naps of any sleep recorded on weekends from actigraphy
Total number of days with naps of any sleep recorded on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa163
Total number of days with naps of at least 15 minutes in length on weekends from actigraphy
Total number of days with naps of at least 15 minutes in length on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa164
Average number of naps in 24 hours (including main rest intervals and naps) on weekends from actigraphy
Average number of naps in 24 hours (including main rest intervals and naps) on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa165
Average number of naps of any sleep recorded on weekends from actigraphy
Average number of naps of any sleep recorded on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa166
Average number of naps of at least 15 minutes in length on weekends from actigraphy
Average number of naps of at least 15 minutes in length on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa167
Average sleep duration per nap on weekends from actigraphy
Average sleep duration per nap on weekends from actigraphy

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa168
Average sleep duration per nap of any sleep recorded on weekends from actigraphy
Average sleep duration per nap of any sleep recorded on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa169
Average sleep duration per nap of at least 15 minutes in length on weekends from actigraphy
Average sleep duration per nap of at least 15 minutes in length on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa17
Average exposure to white light in main sleep over all days from actigraphy
Average exposure to white light in main sleep over all days from actigraphy

This is the average white light intensity, in lux, between sleep onset and sleep offset times across all main rest intervals with sleep, as generated by Actiware before data optimization.

Sleep Monitoring/Actigraphy
sawa170
Average daily sleep duration in naps on weekends over recorded days from actigraphy
Average daily sleep duration in naps on weekends over recorded days from actigraphy Sleep Monitoring/Actigraphy
sawa171
Average daily sleep duration in naps of at least 15 minutes in length on weekends from actigraph
Average daily sleep duration in naps of at least 15 minutes in length on weekends from actigraph Sleep Monitoring/Actigraphy
sawa172
Average daily start time of in-bed or rest interval in main sleep on weekends from actigraphy
Average daily start time of in-bed or rest interval in main sleep on weekends from actigraphy

This variable is similar to the generated variable sawa40; however sawa40 is calculated based on data generated by Actiware software before data optimization.

Sleep Monitoring/Actigraphy
sawa173
Standard deviation of daily start time of in-bed or rest period in main sleep on weekends from actigraphy
Standard deviation of daily start time of in-bed or rest period in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa174
Average daily sleep onset time on weekends from actigraphy
Average daily sleep onset time on weekends from actigraphy

This variable is similar to variable SAWA44; however, SAWA44 is calculated based on data generated by Actiware software before data optimization

Sleep Monitoring/Actigraphy
sawa175
Standard deviation of the daily sleep onset time on weekends from actigraphy
Standard deviation of the daily sleep onset time on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa176
Average daily sleep offset time on weekends from actigraphy
Average daily sleep offset time on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa177
Standard deviation of daily sleep offset time on weekends from actigraphy
Standard deviation of daily sleep offset time on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa178
Average daily end time of in-bed or rest interval in main sleep on weekends from actigraphy
Average daily end time of in-bed or rest interval in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa179
Standard deviation of the daily end time of in-bed or rest interval in main sleep on weekends from actigraphy
Standard deviation of the daily end time of in-bed or rest interval in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa18
Average duration of daily sleep period from actigraphy
Average duration of daily sleep period from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

This variable is similar to sawa52; however, sawa18 is generated by Actiware software before data optimization.

Sleep Monitoring/Actigraphy
sawa180
Average daily mid-point time of in-bed or rest interval in main sleep on weekends from actigraphy
Average daily mid-point time of in-bed or rest interval in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa181
Standard deviation of the daily mid-point time of in-bed or rest interval in main sleep on weekends from actigraphy
Standard deviation of the daily mid-point time of in-bed or rest interval in main sleep on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa182
Average daily mid-point for sleep period in main sleep on weekends from actigraphy
Average daily mid-point for sleep period in main sleep on weekends from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy
sawa183
Standard deviation of the daily midpoint for sleep period in main sleep on weekends from actigraphy
Standard deviation of the daily midpoint for sleep period in main sleep on weekends from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy
sawa184
Average whte light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy
Average whte light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa185
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy
Average blue light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa186
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy
Average green light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa187
Average red light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy
Average red light time above 1,000 microwatts per square centimeter threshold over 24-hour periods on weekends from actigraphy Sleep Monitoring/Actigraphy
sawa188
Total number of the main rest intervals that directly precede the subject going to work or school from actigraphy
Total number of the main rest intervals that directly precede the subject going to work or school from actigraphy Sleep Monitoring/Actigraphy
sawa189
Average daily total sleep duration in main sleep and naps combined on workdays from actigraphy
Average daily total sleep duration in main sleep and naps combined on workdays from actigraphy

Sleep duration is the interval between sleep onset and sleep offset time while asleep.

Sleep Monitoring/Actigraphy
sawa19
Average daily sleep onset latency across all days from actigraphy
Average daily sleep onset latency across all days from actigraphy

This variable is similar to sawa56; however, sawa19 is generated by Actiware software before data optimization.

Sleep Monitoring/Actigraphy
sawa190
Standard deviation of sleep period in 24 hours on workdays from actigraphy
Standard deviation of sleep period in 24 hours on workdays from actigraphy Sleep Monitoring/Actigraphy
sawa191
Average daily duration of rest period in main sleep on workdays from actigraphy
Average daily duration of rest period in main sleep on workdays from actigraphy

Rest period is the interval between the start and end of the rest interval, used in actigraphy.

Sleep Monitoring/Actigraphy
sawa192
Standard deviation of rest period in main sleep on workdays from actigraphy
Standard deviation of rest period in main sleep on workdays from actigraphy

Rest period is the interval between the start and end of the rest interval, used in actigraphy.

Sleep Monitoring/Actigraphy
sawa193
Average daily sleep period on workdays from actigraphy
Average daily sleep period on workdays from actigraphy

Sleep period is the interval between sleep onset and sleep offset time.

Sleep Monitoring/Actigraphy