First Admission Incidence Study of Mania, 1975–1981

Abstract

The study confirmed the impression that the local incidence of mania in Dublin is higher than that reported from two other North European centres. A variation in rates from contrasting socioeconomic districts within the catchment area points to some caution in the interpretation of the results and suggests further study from wider catchment areas.

Incidence rates and risk factors of bipolar disorder in the general population: a population‐based cohort study

“…The overall IR for bipolar disorder in the present study is in line with that in the literature, suggesting the validity of the sample and method of ascertainment .…”

“…Therefore, the identification of risk factors for this disorder can play an important role in prevention and early detection, in turn contributing to the amelioration of this burden. Some risk factors that have been identified thus far include age, ethnicity, socioeconomic circumstances, and degree of population mobility or urbanization (2)(3)(4)(5)(6)(7). Further evidence regarding the populations at risk for bipolar disorder may help to elucidate possible underlying causes.…”

“…As the incidence of bipolar disorder is relatively low, it is difficult to study the disorder in the general population. Most incidence studies in bipolar disorder identify cases at admission (3)(4)(5)(6)(7)(8)(9)(10)(11)(12). However, changes in diagnostic criteria over time and changes in philosophy with regard to the need for admission have resulted in a considerable variability in the estimated incidence [i.e., ranging between 0.17/10000 person-years (PY) and 1.23/10000 PY].…”

High Concordance of Bipolar I Disorder in a Nationwide Sample of Twins

“…The probands were screened by using data from the twin cohort surveys and the National Hospital Discharge Register for the follow-up period of 1969 to 1991. The annual incidence of bipolar I disorder in the sample was in accordance with rates in previous studies (33,34). We were able to check the annual incidence in the Finnish 1954-1959 birth cohort during the follow-up period 1970-1991 and found it to be well in accordance with the incidence in our twin population.…”

Outcome following a first manic episode: cross‐national US and Taiwan comparison

“…However, very little is known about differences in presentation and course across different national and cultural groups, as there have been few cross-national comparisons of these variables in BD. Moreover, those comparisons that have been reported typically involved similar groups living in nearby countries [i.e., between different European nations (4,5)], or used different methods at different sites (2). Cross-national Strakowski Objectives: Bipolar disorder (BD) is recognized as a significant psychiatric condition worldwide, yet little is known about cross-national differences in the course of illness.…”