Better Sleep Tied to Less Loneliness

HOUSTON — Sleep may have a role in driving down rates of loneliness, especially among younger adults.

A study of nearly 2300 participants showed that better sleep health is associated with significantly lower levels of loneliness across ages and that the association is particularly strong in younger individuals.

The US Surgeon General has identified loneliness as "a major public health concern, linked to high rates of negative physical and mental health outcomes," lead researcher Joseph Dzierzewski, PhD, vice-president for research and scientific affairs at the National Sleep Foundation, told Medscape Medical News.

"Loneliness is an urgent public health crisis, and there is a pressing need for providers to better understand and treat it," Dzierzewski said in a statement.

"Better sleep health might be connected to lower feelings of loneliness by empowering people to engage in social activities, reducing feelings of negative emotions and increasing the likelihood that people interpret interactions in a positive way," he added.

The findings were presented at SLEEP 2024: 38th Annual Meeting of the Associated Professional Sleep Societies and recently published in an online supplement of the journal Sleep.

Rested, Connected

An American Psychiatric Association poll conducted earlier this year showed 30% of US adults reported feelings of loneliness at least once a week over the past year, and 10% reported feeling lonely every day.

Younger people are more likely to report feeling lonely, with 30% of Americans, aged 18-34 years, feeling lonely every day or several times a week.

While there is growing research identifying a relationship between loneliness and poor sleep in different age groups, few studies have explored ties between social and emotional loneliness and sleep health across the adult lifespan.

In the current study led by Dzierzewski, 2297 adults (mean age, 44 years; 51% male) completed a validated sleep health questionnaire and loneliness scale.

Linear regression analyses were used to examine the direct associations between sleep health, age, and loneliness. Moderation analyses tested whether the link between sleep health and loneliness differed by age.

On average, the total sleep score was 7.7 (range, 0-12), with higher scores indicating better multidimensional sleep health, and total loneliness scale score was 8.9 (out of 11), indicating moderate levels of loneliness.

Better sleep health and younger age were associated with significantly lower loneliness total scores and social and emotional loneliness subscale scores (all P < .001).

Age significantly moderated the association between sleep health and total (P < .001) and emotional loneliness scores (P < .001) but did not moderate the association between sleep health and social loneliness (P = .034). Better sleep health was associated with lower loneliness across ages, and this association was stronger at younger ages.

"Why younger adults might experience more sleep-related benefits to loneliness than older adults is unknown and intriguing — certainly worth further investigation," Dzierzewski said in a conference statement.

Untapped Avenue

Promoting sleep health may be an "untapped avenue" to support efforts and programs that aim to reduce loneliness and increase engagement in all age groups but especially in younger ages, the researchers noted.

Future research should consider monitoring sleep health in programs or interventions that address loneliness, they added.

"Healthcare providers should be aware of the important link between sleep health and loneliness as both sleep and social connections are essential to health and well-being. When sitting across from patients, asking about both sleep health and loneliness might yield important insights into avenues for health promotion," said Dzierzewski.

Michael Breus, PhD, clinical psychologist and founder of TheSleepDoctor.com, who wasn't involved in the study, is not surprised by the results.

It makes sense that better sleep would lead to less feelings of loneliness, he told Medscape Medical News.

Research has shown that when someone is not sleeping well, they "give others a sense of unhappiness, which socially deflects new encounters or even encounters with friends. So social awareness and social initiation would appear to both be affected by sleep quality, therefore potentially leading, at least in part, to loneliness," he said.

Support for the study was provided by the National Institute on Aging. Dzierzewski and Breus have no relevant disclosures.