09:24am Monday 23 September 2019

Hearing voices could be a marker for serious mental illness in adolescents

For most of these children, the auditory hallucinations stop as they get older – but those who continue to experience them may be at risk of complex mental illnesses.

The HRB-funded research team, led by Professor Mary Cannon, HRB Clinician Scientist at the Royal College of Surgeons in Ireland (RSCI) and Beaumont Hospital, assessed nearly 2,500 children, aged between 11 and 16 years, in four separate studies.

They found that 21-23% of younger adolescents (aged 11-13 years) had experienced auditory hallucinations. Just over half (57%) of the younger adolescents who heard voices were found to have a psychiatric disorder following clinical assessment.

In older adolescents (aged 13-16 years), just 7% reported hearing voices. However, nearly 80% of the older adolescents who heard voices were found to have a psychiatric disorder – showing a clear association between auditory hallucinations and serious mental illness.

Lead researcher on the paper Dr Ian Kelleher, RCSI explains,
’We found that auditory hallucinations were common even in children as young as 11 years old. Auditory hallucinations can vary from hearing an isolated sentence now and then, to hearing “conversations” between two or more people lasting for a several minutes. It may present like screaming or shouting and other times it could sound like whispers or murmurs. It varies greatly from child to child, and frequency can be once a month to once every day.

For many children, these experiences appear to represent a ‘blip’ on the radar that does not turn out to signify any underlying or undiagnosed problem. However, for the other children, these symptoms turned out to be a warning sign of serious underlying psychiatric illness, including clinical depression and behavioural disorders, like attention deficit hyperactivity disorder. Some older children with auditory hallucinations had two or more disorders. This finding is important because if a child reports auditory hallucinations it should prompt their treating doctor to consider that the child may have more than one diagnosis.’

Professor Mary Cannon, adds,
‘Our study suggests that hearing voices seems to be more common in children than was previously thought. In most cases these experiences resolve with time. However in some children these experiences persist into older adolescence and this seems to be an indicator that they may have a complex mental health issue and require more in-depth assessment.’

For more information, please contact: Gillian Markey, Communications Manager, Health Research Board. Tel: +353 87 2288514. Email: gmarkey@hrb.ie  

Kelleher I, Keeley H, Corcoran P, Lynch F, Fitzpatrick C, Devlin N, Molloy C, Roddy S, Clarke MC, Harley M, Arseneault L, Wasserman C, Carli V, Sarchiopone M, Hoven C, Wasserman D and Canon M. Clinicopathological significance of psychotic symptoms in non-psychotic young people: evidence from four population-based studies. British Journal of Psychiatry, ePub ahead of print 12 April 2012, doi: 10.1192/bjp.bp.111.101543

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