Table 1 Questionnaire items used to measure functional status

Unemployment due to fatigue

Are you unemployed because of your current fatiguing illness?

Current hours per week spent on:

During the past 4 weeks, on average, how many hours per week did you spend...

   Work

...on work duties including working from home and travel related to work?

   Household chores

...on household chores, such as cleaning, grocery shopping, and caring for your family?

   Other activities

...on activities such as hobbies, schooling, or volunteer work?

Prior to fatigue onset, hours per week spent on:

Before your fatigue began, on average, how many hours per week did you spend...

   Work

...on work duties including working from home and travel related to work?

   Household chores

...on household chores, such as cleaning, grocery shopping, and caring for your family?

   Other activities

...on activities such as hobbies, schooling, or volunteer work?

Energy level

During the past 4 weeks, where would you place yourself in terms of energy, wellness, and ability to complete your everyday activities on a scale from 1 to 100? 1 is the worst you could feel and 100 is the best you could feel.