Table 1.

Schedule of measurements for the study in SleepTrackTXT pilot trial

Measure	At baseline enrollment	Beginning of every scheduled shift	Every 4 hrs during scheduled shifts	End of every scheduled shift	Subject reports an injury (at end of shift, or at any time)	At 90-days end of study
Demographic survey	X
Pittsburgh Sleep Quality Index (PSQI)	X					X
Chalder Fatigue Questionnaire (CFQ)	X					X
Schedule Attitudes Survey (SAS)	X					X
Occupational Fatigue, Exhaustion, Recovery Scale (OFER)	X					X
Sleep, Fatigue, Alertness Behavior Survey (SFAB)	X					X
Hours of sleep in past 24 hours		X
Rate sleepiness now		X	X	X
Rate fatigue now		X	X	X
How difficult is it to concentrate now		X	X	X
Estimate total number of patients you saw during your shift				X
Were you injured during your shift?				X	X
Describe the type of injury and body part affected*				X*	X*
Rate sleepiness at time of injury*					X*
Rate fatigue at time of injury*					X*
How difficult was it to concentrate at time of injury*					X*
Intervention group only a
During your shift, did you take a nap, drink caffeine, stretch or exercise, or talk to your partner to stay alert?				X
What strategy did you adopt?				X
Did it help reduce your fatigue or sleepiness?				X

*if subject reports an injury.

^aThese measures are administered to the intervention group when a subject reports a high level of sleepiness, fatigue, or difficulty concentrating at the beginning or during shift assessments.