SLEEP behaviors
Sleep was measured objectively with actigraphy and subjectively with self-report. Objective sleep measures were collected using an accelerometer (Actiwatch Spectrum Plus; Philips-Respironics, Murrysville, PA) worn on the non-dominant wrist for one week. Data were collected and exported at 30-s epochs, where at least two independent scorers visually determined validity of data and set sleep intervals for periods greater or equal to 20 min using a graphical user interface. Together, the scorers reviewed each recording to determine the final number of valid days and sleep intervals using a validated scoring procedure [