Seasonality of admissions for mania in a psychiatric hospital of Belo Horizonte, Brazil

Involuntary admissions in Italy: the impact of seasonality

“…In spring/summer, high hospitalization rates for manic episode (as principal reason for involuntary admission) are well stated, due to an increase in total sunshine hours and length of the average monthly days (Wang & Chen 2013;Abreu & Braganca 2015;Hochman et al 2016). Other studies showed, in addition to the main peak in spring/summer, a lower frequency of manic involuntary admissions in autumn (Cassidy & Carroll 2002;Lee et al 2002;Morken et al 2002;Volpe and Del Porto 2006;Lee et al 2007;Volpe et al 2010;Yang et al 2013;Geoffroy et al 2014). Furthermore, patients with bipolar disorder and seasonal-affective disorder have a higher light sensitivity compared to healthy controls and patients affected by major depressive disorder, as a result of melatoninergic, serotoninergic and dopaminergic neurotransmissions (Nathan et al 1999;Quera Salva et al 2011).…”

“…Furthermore, the prevalence of hospitalization in patients with bipolar depression has a main peak in early winter and a minor one in summer (Modai et al 1994;Avasthi et al 2001;Lee et al 2007;Amr & Volpe 2012;Yang et al 2013;Dominiak et al 2015). Many studies examining bipolar patients, correlate the intensity of sunlight with a rise in the number of admissions for manic episode, and a decrease in hospitalization rates for depressive episode (Sayer et al 199;Modai et al 1994;Volpe & del Porto 2006;Dominiak et al 2015). Studies concerning hospitalizations of schizophrenic patients are conflicting.…”

Psychiatric hospitalizations for affective disorders in Warsaw, Poland: Effect of season and intensity of sunlight

“…Many studies have indicated that intensity of sunlight is positively correlated with the number of admissions for mania, and negatively for bipolar depression (Myers and Davies, 1978;Sayer et al, 1991;Abdul-Rahim et al, 1992;Modai et al, 1994;Volpe and del Porto, 2006). But there are also opposing reports in the literature which show that the number of admissions of mania patients declines with increasing amounts of sunshine and also that the number of depression admissions rises (Lee et al, 2007).…”

Comparison of precipitating factors for mania and partial seizures: Indicative of shared pathophysiology?

“…Using hospital admissions data, increases have been found in summer (Takei et al, 1992;Barbini et al, 1995), and spring and summer (Mulder et al, 1990;Lee et al, 2002). By contrast, data obtained from Brazil has shown that a peak in instances of mania is observed during winter-spring months which is associated with the dryer, colder, increased daylight seasons (Volpe and Del Porto, 2006;Volpe et al, 2010). Some have found no effect of seasonality and hospital admissions for mania (Daniels et al, 2000).…”