Fig. 1
From: Impairment in sleep health in young adults with chronic pain: a modifiable risk factor
Sleep health domains—sleep health includes sleep quality (the subjective assessment of good or poor sleep, waking up unrefreshed), alertness (the ability to maintain attentive wakefulness), sleep timing (the placement of sleep within 24 h), sleep efficiency (the ease of falling asleep and returning to sleep) and sleep duration (the total amount of sleep obtained per 24 h)