The British Journal of Psychiatry 136: 456-462 (1980)
© 1980 The Royal College of Psychiatrists
Sleep disorder over time: psychiatric correlates among males
H Sweetwood, I Grant, DF Kripke, MS Gerst and J Yager
This 18 month prospective study assessed the time course of sleep
disturbances in 85 male psychiatric out-patients and 103 male non-
patients. Over one-third of the patients and 5 per cent of the non-
patients reported frequent symptoms of insomnia during at least 14 of the
18 months. Frequency and chronicity of insomnia were strongly associated
with intensity of psychiatric symptomatology, but not with diagnosis. Minor
tranquillizers and hypnotics were used frequently by patients and
occasionally by non-patients, but there was little indication that they
altered the course of insomnia.