Children with more sleep problems could also feel lonelier: a latent profile analysis
Using latent profile analysis on a cohort of primary school children in East London, this study found that distinct patterns of sleep problems (low, moderate, and high) are significantly associated with varying levels of loneliness in later childhood, with children exhibiting moderate or high sleep problems reporting greater loneliness than those with low sleep problems.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of a preprint that has not been peer-reviewed. It is not medical advice. Do not make health decisions based on this content. Read full disclaimer
Loneliness is a universal human experience, a feeling of isolation that strikes when we sense our social connections are not enough. While often discussed as a crisis of adolescence or adulthood, this emotional state can take root much earlier, during the middle years of childhood when children are learning to navigate complex friendships and social hierarchies. At the same time, sleep is a fundamental biological process, a nightly reset that allows the growing brain to organize emotions, consolidate memories, and prepare for the social demands of the next day. For decades, scientists have known that poor sleep and feelings of isolation often travel together in adults, but the link between these two forces in younger children has remained a mystery. Understanding whether a restless night can lead to a lonely heart in a primary school student is crucial, because if the two are connected, fixing one might help heal the other.
A team of researchers based in London set out to explore this connection among children aged seven to eleven. They followed a large group of students from schools in East London, an area with a mix of backgrounds and economic challenges, to see if patterns of sleep problems could predict how lonely a child would feel later on. The researchers did not just look at whether a child had a bad night here and there; instead, they looked for distinct groups, or profiles, of children who shared similar patterns of sleep difficulties over time. They wanted to know if children who consistently struggled with sleep felt more alone than those who slept well, even after taking into account how lonely they felt before and their age, gender, and background.
To find these patterns, the study tracked nearly eight hundred children across two different points in time. The children reported on their own sleep habits, answering questions about how hard it was to fall asleep, whether they woke up during the night, and if they felt tired during the day. Using a statistical method that groups people by their similar responses, the researchers identified three clear groups. About half of the children fell into a "low" group, meaning they rarely had trouble sleeping. Another group, representing roughly a third of the children, showed a "moderate" level of sleep problems. The smallest group, comprising about ten percent of the children, faced "high" levels of sleep difficulties. These groups remained distinct as the children were assessed again months later, showing that sleep struggles tend to be a persistent trait for some children rather than a one-off event.
The researchers then asked the critical question: did these sleep groups feel different amounts of loneliness? They measured loneliness at the start and again at the end of the study period, asking the children how often they felt left out, had no one to talk to, or felt alone. When they compared the groups, a clear picture emerged. Children in the moderate and high sleep problem groups reported feeling significantly lonelier at the end of the study than those in the low sleep problem group. This difference held true even after the researchers adjusted for how lonely the children felt at the beginning of the study and for factors like age, gender, and the economic status of their neighborhood. In fact, the loneliness scores rose in a steady step: the low sleep group felt the least lonely, the moderate group felt more, and the high sleep group felt the most.
The study also looked at who was more likely to fall into the groups with more sleep trouble. The researchers found that older children were less likely to have sleep problems, while girls were more likely to report them than boys. Additionally, children living in neighborhoods with higher levels of deprivation were more likely to be in the high sleep problem group. However, once the researchers accounted for the sleep patterns themselves, these demographic factors no longer explained the differences in loneliness. This suggests that the sleep difficulties themselves, rather than just the circumstances of the children's lives, were the driving force behind the increased feelings of isolation.
While the study shows a strong link between persistent sleep problems and loneliness, the researchers are careful to note that they cannot say for certain that bad sleep causes loneliness. It is possible that feeling lonely makes it harder to sleep, or that a third factor influences both. What the study does establish is that children who struggle with sleep over time are also the ones who report feeling more isolated later on, independent of their earlier feelings or their background. This finding is significant because it highlights sleep as a potential early warning sign for social and emotional struggles in middle childhood. If a child is consistently having trouble sleeping, they may be at greater risk for feeling lonely, suggesting that helping them sleep better could be a vital step in supporting their social well-being. The researchers conclude that future work needs to untangle the exact direction of this relationship, but for now, the message is clear: sleep and social connection are deeply intertwined, even for the youngest among us.
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