AGE AND REMISSION OF PSYCHIATRIC-DISORDERS

Objective: To examine the relationship between remission of psychiatri c disorders and age. Methods: We interviewed 3258 randomly selected ad ult residents of Edmonton using the Diagnostic Interview Schedule (DIS ), which yielded DIS/DSM-III diagnoses. Remission was defined as being free of symptoms of the index lifetime disorder in the year preceding the interview, this being the difference between the lifetime and one -year prevalence. For each age group, the proportion of cases with and without symptoms in the preceding year was calculated Numbers and pro portions of cases were estimated after adjusting to the census populat ion and weighting for household size. Only the more common disorders w ere examined; any comorbidities were ignored. Results: Drug abuse or d ependence, antisocial personality disorder (in both sexes), and alcoho l abuse or dependence (in men) all showed remission rates that increas ed with age. Panic disorder and obsessive-compulsive disorder (OCD) sh owed a decreased likelihood of remission with increasing age. Major de pression and phobias showed little tendency to remission with age Cons idering all disorders together, the one-year remission rate for all ag es combined was only 33.2%, with a tendency for-lower remission rates to be found in those aged 55 to 64. Conclusions: As may be expected, a ntisocial personality, drug abuse or dependence, and alcohol abuse or dependence tend to show increased remission rates with increasing age. In OCD and panic disorder, the low rates of remission found in all ag e groups indicate that these disorders produce significant long-term m orbidity. For depression which had an overall remission rate of less t han 50%, the stable low rate of remission probably indicates not only the difficulties of treatment but also the low rates at which? eases g et treated.