Perceived Stress Scale (PSS) 1. In the last month, how often have you been upset because of something that happened unexpectedly? Never Almost Never Sometimes Fairly Often Very Often 2. In the last month, how often have you felt that you were unable to control the important things in your life? Never Almost Never Sometimes Fairly Often Very Often 3. In the last month, how often have you felt nervous and "stressed"? Never Almost Never Sometimes Fairly Often Very Often 4. In the last month, how often have you felt confident about your ability to handle your personal problems? Never Almost Never Sometimes Fairly Often Very Often 5. In the last month, how often have you felt that things were going your way? Never Almost Never Sometimes Fairly Often Very Often 6. In the last month, how often have you found that you could not cope with all the things that you had to do? Never Almost Never Sometimes Fairly Often Very Often 7. In the last month, how often have you been able to control irritations in your life? Never Almost Never Sometimes Fairly Often Very Often 8. In the last month, how often have you felt that you were on top of things? Never Almost Never Sometimes Fairly Often Very Often 9. In the last month, how often have you been angered because of things that were outside of your control? Never Almost Never Sometimes Fairly Often Very Often 10. In the last month, how often have you felt difficulties were piling up so high that you could not overcome them? Never Almost Never Sometimes Fairly Often Very Often Calculate Score