Sleep difficulties linked to poorer wellbeing in Welsh school survey study

Sleep difficulties are among the factors most strongly associated with poorer mental wellbeing and greater emotional or behavioural difficulties in a Welsh school survey study published by Public Health Wales on 23 September. Bullying, academic pressure, negative body image and feeling less supported by friends or teachers were also linked to worse outcomes.

What the study measured

The report draws on School Health Research Network surveys of pupils aged 11 to 16. Its analysis of associated factors includes more than 175,000 young people across multiple survey years. The report describes the 2019/20 and 2021/22 survey rounds, so this is not a poll taken this September. Pupils answered questions about their experiences and completed measures of wellbeing and emotional or behavioural difficulties. Those questionnaires do not diagnose individual children.

A link is not proof of a cause

The researchers accounted for demographic and social factors, including age, sex and deprivation. The patterns still showed associations between sleep, school pressure, relationships and the two health measures. But the report explicitly warns that these are observational findings: they do not prove that one factor caused another. Mental health difficulties and wellbeing are related but distinct. A young person can experience difficulties while retaining supportive friendships and a sense of belonging, or report low wellbeing without having a diagnosable condition.

What can be missing from NHS records

A separate linked-data analysis covered 59,577 adolescents. Of the 28,264 classified as having high psychosocial need, 10,345 had no recorded contact with the NHS services included in the study during the preceding five years. That is 36.6% of the high-need group, not of all Welsh young people. The records covered general practice, hospital care, emergency departments and ambulance services, rather than mental health services alone.

What the findings do not establish

The absence of a record does not mean a young person received no help. School, community, voluntary-sector or private support may fall outside the linked datasets. Nor does the measure show that everyone in that group needed specialist child and adolescent mental health services. Public Health Wales recommends stronger early support through families, schools and health services, action on bullying and academic pressure, and measuring wellbeing alongside mental health difficulties. The report identifies opportunities for support; it does not provide a diagnosis or treatment plan for an individual child.