Table 2 Key data collection measures by data collection sources
Web-based Survey | Ecological Momentary Assessment (EMA) | Student Card | |
|---|---|---|---|
Frequency | 4 time points | 4 waves (4 days each) | Continuous |
Timing | August, November, January, April | October, November, February, March | Continuous |
Outcomes (descriptions/examples of measures) | |||
Dietary intake | During the past month, how often did you: [25] • Eat hot or cold cereals and what kind of cereal • Have any milk and what kind of milk During the past month, how often did you drink: [25, 26] • Regular soda • 100 % pure fruit juice • Coffee or tea with honey or sugar • Sweetened fruit drinks • Sports drinks • Energy drinks During the past month, how often did you eat: [25] • Fruit • Green leafy salad • Fried potatoes • Other kinds of potatoes • Beans (not green beans) • Brown rice or cooked whole grains • Other vegetables • Salsa During the past month, how often did you eat: [25] • Pizza • Tomato sauce • Cheese • Red meat • Processed meat During the past month, how often did you eat: [25] • Whole grain bread • Chocolate or candy • Doughnuts, sweet rolls • Cookies, cakes, pie, brownies • Ice cream, frozen desserts • Popcorn | Are you eating any of the following items? (please check all that apply) [48] • Cookies, sweetened baked goods, candy and frozen desserts • Salty snacks/fried side dishes • Fruits and vegetables (including salads) • Pizza and fast food • Sandwiches (hot and cold), wraps, breads, pitas, and tortillas • Meat, poultry, fish, eggs, and meat alternatives • Pasta, noodles, rice, and other grains • Hot and cold cereals • Other(specify): __________ Are you drinking any of the following items? (please check all that apply) [48] • Sweetened beverages • Coffee or tea drinks • Smoothies • Sports drinks • Energy drinks • Milk • Juice • Water • Other (specify): __________ | Location (fast-food, sit-down restaurant, dining hall, convenience store, etc.) Amount of expenditure |
Physical activity [30] | In a usual week, how many hours do you spend doing the following activities? [Strenuous exercise/Moderate exercise/Mild exercise] [None, less than 1/2 h a week, 1/2–2 h a week, 2–4 h a week, 4–6 h a week, 6+ h a week] | Select the activity that most closely matches what you are doing (not including responding to this assessment). • Strenuous exercise (heart beats rapidly) (e.g., running, swimming laps, zumba) • Moderate exercise (not exhausting) (e.g., walking quickly, strength training) • Mild Exercise (little effort) (e.g., walking slowly, yoga) In total, how much time will you spend on this activity? [<30 min, 30 min–1 h, 1–2 h, >2 h] | Check-ins at campus exercise facilities |
In your free time on an average week, how many hours do you spend doing the following activities? [0 h, ½ h, 1 h, 2 h, 3 h, 4 h, 5+ h] • Watching TV/DVDs/videos • Using a computer • Electronic games that you play when sitting | Select the activity that most closely matches what you are doing (not including responding to this assessment). • Reading/attending class/doing homework/studying • Hanging out • Texting/using phone • Watching TV or movie • Browsing the internet • Using social media on the internet • Playing video games • Sleeping/lying in bed • Working/attending a meeting • Showering/getting ready • Eating • Other (specify): In total, how much time will you spend on this activity? [<30 min, 30 min–1 h, 1–2 h, >2 h] | -- | |
Weight status | • Measured height, weight, waist and hip circumference • Self-reported height and weight | -- | -- |
Predictors and moderators/mediators | |||
Friendship network and friends | Identify your 5 closest male friends and 5 closest female friends in your residence hall [34–37] • List them in order of closeness (best friend first) • Identify your roommate | Who is with you? • I am by myself • Friend(s)  ○ Select which of the following friends were with you (a list of the participants nominated friends will appear. Participants can choose none of the above)  ○ Other friend(s):  ○ How many female friends?  ○ How many male friends? • Roommate • Classmates/peers/coworkers • Family • Significant other (select) • Other (specify):___________ | Time stamp and location; friends’ data will be linked |
Friendship-network mechanisms | • Time spent with friend(s) on eating/PA/sedentary activities • Type of friends • Length of friendship • Friendship closeness [38] • Friendship maintenance [39] | Select if any factors below were involved in your [eating/drinking/PA/inactive PA] (Please check all that apply) [8, 68]. • Scheduled time (for meals, gym, work out class etc.) • Friend(s) suggested it • Food/Drink/Gym or opportunity was easily available • In lecture/lab or similar • Others do it, so I feel I should too • Wanted to celebrate • I saw someone else doing it • None of the above • Other (specify): _____ If you were alone, would you have made the same choice in eating/drinking/being active/not being active? | -- |
Geospatial place | -- | Automatic GIS longitude/latitude coding embedded into EMA app | Location of expenditure |
Time | -- | Automatic time stamp embedded into EMA app | Automatic time stamp |