Table 2. Survey questions.

General questions (1 cup = 8 oz of liquid)

∙ Year in school? (Freshman, Sophomore, Junior, Senior, Fifth Year or “Super Senior”)

∙ Sex (Male, Female)

∙ Have you been diagnosed with anxiety or depression? (Anxiety, Depression, Both, Never)

∙ What is your current GPA? (<2.0, 2.0-2.4, 2.5-2.9, 3.0-3.4, 3.5-4.0)

∙ How much caffeine do you consume per day? (None, 1, 2, 3, 4, 5, 6, >6 cups)

∙ How many times a week do you consume caffeine? (Never, 1, 2, 3, 4, 5, 6 times/week, Daily)

∙ What source of caffeine do you utilize most often? (Coffee, Tea, Soda, Other)

∙ For what reason do you most often consume caffeine? (Studying/Homework, To stay awake in class, For pleasure or enjoyment, e.g., You like the taste of coffee or tea, Other)

Patient Health Questionnaire-9 (PHQ-9)

Over the past 2 weeks, how often have you been bothered by any of the following problems? (Not at all, Several days, More than half the days, or Nearly every day)

∙ Little interest or pleasure in doing things

∙ Feeling down, depressed, or hopeless

∙ Trouble falling or staying asleep, or sleeping too much

∙ Feeling tired or having little energy

∙ Poor appetite or overeating

∙ Feeling bad about yourself, or that you are a failure or have let yourself or your family down

∙ Trouble concentrating on things, such as reading the newspaper or watching television

∙ Moving or speaking so slowly that other people could have noticed. Or the opposite—being so fidgety or restless that you have been moving around a lot more than usual

∙ Thoughts that you would be better off dead, or of hurting yourself in some way

Generalized Anxiety Disorder-7 (GAD-7)

Over the past 2 weeks, how often have you been bothered by any of the following problems? (Not at all, Several days, More than half the days or Nearly every day)

∙ Feeling nervous, anxious, or on edge

∙ Not being able to stop or control worrying

∙ Worrying too much about different things

∙ Trouble relaxing

∙ Being so restless that it’s hard to sit still

∙ Becoming easily annoyed or irritable

∙ Feeling afraid as if something awful might happen