Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Intraindividual changes in sleep duration measured by wearable device (mins) across time |
We hypothesise that participants will exhibit shorter sleep durations on nights in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in sleep timing measured by wearable device (mins) across time |
We hypothesise that participants will exhibit later sleep timings on nights in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in sleep regularity measured by wearable device (mins) across time |
We hypothesise that participants will exhibit less regular sleep timings on nights in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in nap behaviour measured by self-report and wearable device (mins) across time |
We hypothesise that participants will exhibit more polyphasic sleep schedules (more nap episodes) in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in daily self-reported stress across time |
We hypothesise that participants will report higher levels of stress in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in daily self-reported sleep quality across time |
We hypothesise that participants will report poorer sleep quality in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in daily self-reported mood across time |
We hypothesise that participants will report more negative mood reports in closer proximity to exam dates. |
4 weeks |
|
Primary |
Intraindividual changes in glucose values across time |
We hypothesise that mean daily, diurnal, nocturnal, and postprandial glucose values will be higher, and that 24-h glucose will be more variable in closer proximity to exam dates, and that these will be associated with the extent of sleep pattern alteration experienced by participants. |
4 weeks |
|
Primary |
Intraindividual changes in average glucose across time |
We hypothesise that average daily glucose values will be higher in closer proximity to exam dates, and that these changes will be associated with the extent of sleep pattern alteration experienced by participants. |
4 weeks |
|
Primary |
Intraindividual changes in glycemic variability across time |
We hypothesise that daily glucose values will be more variable in closer proximity to exam dates, and that these changes will be associated with the extent of sleep pattern alteration experienced by participants. |
4 weeks |
|
Primary |
Intraindividual changes in postprandial glucose across time |
We hypothesise that average postprandial change in glucose will be higher in closer proximity to exam dates, and that these changes will be associated with the extent of sleep pattern alteration experienced by participants. |
4 weeks |
|
Primary |
Differences in average glucose between individuals with habitually different sleep profiles |
We expect to observe higher daily average glucose among individuals who habitually obtain less sleep and have greater irregularity in sleeping patterns, compared to individuals who obtain more sleep and have more regular sleeping patterns |
4 weeks |
|
Primary |
Differences in glycemic variability between individuals with habitually different sleep profiles |
We expect to observe more variable daily glucose values among individuals who habitually obtain less sleep and have greater irregularity in sleeping patterns, compared to individuals who obtain more sleep and have more regular sleeping patterns |
4 weeks |
|
Primary |
Accuracy of sleep detection using multiple data sources |
We hypothesise that sleep detection accuracy will increase when wearable, WIFI and smartphone-based data sources are combined. |
4 weeks |
|
Primary |
Effect of sleep restriction condition on glucose tolerance measured by oral glucose tolerance test. |
We hypothesise that higher glucose tolerance will be observed in the sleep restriction condition compared to the baseline sleep condition. |
1 day |
|
Primary |
Effect of sleep restriction condition on insulin resistance measured by oral glucose tolerance test. |
We hypothesise that higher insulin resistance will be observed in the sleep restriction condition compared to the baseline sleep condition. |
1 day |
|