Sleep, Exercise, Nutrition and Survivorship in Prostate Cancer

The study team will use ActiGraph software to calculate device-based measures of sleep efficiency. Sleep efficiency is the ratio of total sleep time (total time spent asleep) to time in bed and is reported as a percentage (total sleep time / time in bed x 100).

The study team will use ActiGraph software to calculate device-based measure number of awakenings (when a participant wakes up) after sleep onset (the transition from wakefulness into sleep).

The study team will use ActiGraph software to calculate device-based measures of sleep duration

SHI is a 13-item self-report measure designed to assess the practice of sleep hygiene behaviors. Each item is rated on a five-point scale ranging from 0 (never) to 4 (always). Total scores range from 0 to 52, with a higher score representing poorer sleep hygiene.

PSQI contains 19 self-reported questions and 5 questions rated by the bed partner or roommate (if one is available). Only self-rated questions are included in the scoring. The 19 self-rated items are combined to form seven component scores, each of which has a range of 0-3 points. In all cases, a score "0" indicates no difficulty, while "3" indicates severe difficulty. The seven component scores are then added to yield one "global" score, with a range of 0-21 points; the higher the score, the more severe the difficulties in all areas.

The Insomnia Severity Index has 7 questions, each rated on a 5-point Likert scale (0-4). The total score range is 0-28; the higher the score, the more severe the insomnia. 0-7 = no clinical significant insomnia, 8-14 = subthreshold insomnia, 15-21 = clinical insomnia (moderate severity), and 22-28 = clinical insomnia (severe)

The study team will use ActiGraph's GT3X tri-axial accelerometer and ActiLife software to calculate device-based measures of physical activity. Daily MVPA will be based on least 4 days of at least 10 hours of device wear time. A higher number of minutes of MVPA indicates more physical activity. Among U.S. adults aged 60 years or older, mean number of minutes per day of MVPA ranges from 10.8 to 106.8.

The study team will use ActiLife software to calculate step counts per day. Daily steps will be based on at least 4 days of at least 10 hours of device wear time. A higher step count indicates more physical activity. Based on U.S. population samples, normative daily step count ranges are 41 to 12,780 steps for men aged 60 years or older and 55 to 9,735 for women aged 60 years or older.

The study team will use the International Physical Activity Questionnaire short form (IPAQ-SF). It will be used to assess time spent in 3 specific types of activity over the previous 7 days: vigorous-intensity activities, moderate-intensity activities, and walking. Time spent in these 3 activity types will be combined to calculate total physical activity minutes per day, a continuous variable with a plausible range of 0 to 960. Then, the study team will apply metabolic equivalents by intensity to calculate total physical activity MET-minutes per day.

The study team will use a food frequency questionnaire to measure servings per week of foods. Each food category is measured in never (lowest), once per month, 2-3 times last month, 1 time per week, 2 times per week, 3-4 times per week, 5-6 per week, 1 time per day, 2-3 times per day, 4-5 times per day, and 6+ times per day (highest).