Table 1.

Descriptions of the most commonly used measurements of function, quality of life, fatigue, and sleep

Method	Measures	Domains	Range	MCID
HAQ-DI3	Health-related physical function	Dressing, rising, eating, walking, hygiene, reach, grip, and daily activity	0 to 3	0.22
SF-364	Quality of life	Physical activities, social activities, role functioning due to emotional distress, role functioning due to physical impairment, bodily pain, general mental health, general health perceptions, and vitality	0 to 100	5–10
EQ-5D5,6	Differences in health states in RA	Mobility, self-care, usual activities, pain discomfort and anxiety/depression (mood disorders)	0 to 1	–
FACIT7–9	Quality of life	Physical wellbeing, social/family wellbeing, emotional wellbeing, functional wellbeing	0 to 100	–
FACIT-F7–9	Fatigue	13 items on a 0–4 scale; ie, fatigue, weakness, listlessness, tiredness, energy, difficulty starting things, difficulty finishing things, able to do usual activities, need for assistance in doing usual activities, sleeping during the day, too tired to eat, frustration due to feeling too tired to do things you want, limitation of social activity due to tiredness	0 to 52	4
PSQI10	Quality of sleep	Sleep quality, sleep latency, sleep duration, habitual sleep disturbance, sleep disturbance, use of sleep medication, daytime dysfunction	0 to 21	–
ESS10	Sleepiness	Tendency to fall asleep in certain situations of daily life: reading, watching TV, sitting in public place, sitting in the car as passenger, resting in the afternoon, talking, sitting after lunch, sitting in car after stopping for traffic	0 to 24	–

Abbreviations: HAQ-DI, Health Assessment Questionnaire Disability Index; SF-36, Short Form 36; EQ-5D, European Quality of Life-5 Dimensions; FACIT, Functional Assessment of Chronic Illness Therapy; FACIT-F, Functional Assessment of Chronic Illness Therapy-Fatigue; PSQI, Pittsburgh Sleep Quality Index; ESS, Epworth Sleepiness Scale.