The background, methodology, and general results of a comprehensive survey of treated psychiatric illness in Lebanon have been described in an earlier report (4). The investigation consisted of obtaining biographical and diagnostic data on all patients seen by psychiatrists in Lebanon over a six-month period (15 February 1964 to 15 August 1964) and was carried out with the collaboration of all three psychiatric hospitals in the country and twenty of the twenty-one psychiatrists practising within and outside these institutions.