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

Dominiak, Monika; Święcicki, Łukasz; Rybakowski, Janusz

doi:10.1016/j.psychres.2015.07.011

Cited by 42 publications

(52 citation statements)

References 60 publications

(84 reference statements)

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“…This result agrees with a recent epidemiological study 24 and is likely due to a strong link between the female reproductive hormonal axis and regulatory mechanisms of sunlight sensitivity. 17 Second, a difference in mean age was found. Although substance intoxication usually involves adolescent patients, the greater age observed for the bipolar group could be attributed to the peculiar course of the disorder, with long free intervals and a progressive worsening of the symptoms after every affective recurrence; thus, treatment is often delayed.…”

Section: Discussionmentioning

confidence: 92%

“…9 Specifically, patients with (hypo)manic episodes have higher rates of hospitalization during spring and summer, when sunlight exposure (i.e., the photoperiod) is longer, 10-14 while patients with major depressive episodes are mainly admitted during the winter. 10,[15][16][17] Photoperiod is defined as the number of hours of daylight, which can influence an individual's physiology and metabolic cycles. Ideal photoperiods are approximately 14 hours in summer and 8 to 9 hours in winter.…”

Section: Introductionmentioning

confidence: 99%

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Bipolar disorders: is there an influence of seasonality or photoperiod?

Aguglia

Borsotti

Maina

2017

Rev. Bras. Psiquiatr.

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Objective: To increase understanding of the influence of photoperiod variation in patients with bipolar disorders. Methods: We followed a sample of Italian bipolar patients over a period of 24 months, focusing on inpatients. All patients admitted to the Psychiatric Inpatient Unit of San Luigi Gonzaga Hospital in Orbassano (Turin, Italy) between September 1, 2013 and August 31, 2015 were recruited. Sociodemographic and clinical data were collected. Results: Seven hundred and thirty patients were included. The admission rate for bipolar patients was significantly higher during May, June and July, when there was maximum sunlight exposure, although no seasonal pattern was found. Patients with (hypo)manic episodes were admitted more frequently during the spring and during longer photoperiods than those with major depressive episodes. Conclusions: Photoperiod is a key element in bipolar disorder, not only as an environmental factor but also as an important clinical parameter that should be considered during treatment.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Bipolar disorders: is there an influence of seasonality or photoperiod?

Aguglia

Borsotti

Maina

2017

Rev. Bras. Psiquiatr.

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“…Patients suffering from manic episode have higher rates of admission during spring and summer (Lee et al 2007;Volpe et al 2010;Amr & Volpe 2012;Wang & Chen 2013;Hochman et al 2016). 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).…”

Section: Objectivementioning

confidence: 99%

“…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.…”

Section: Objectivementioning

confidence: 99%

Involuntary admissions in Italy: the impact of seasonality

Aguglia

Moncalvo

Solia

et al. 2016

International Journal of Psychiatry in Clinical Practice

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Objective: The aim of this study is to assess the prevalence of involuntary admissions with regard to seasonality and clinical associated features, in a sample of patients admitted to a psychiatric unit in a period of 24 months. Methods: All subjects consecutively admitted to the Psychiatric Inpatient Unit of the San Luigi Gonzaga Hospital, Orbassano (University of Turin, Italy) from September 2013 to August 2015 were recruited. Socio-demographic and clinical characteristics were collected. Results: Seven hundred and thirty admissions in psychiatric ward were recognized. The prevalence of involuntary admission was 15.4%. Patients with involuntary hospitalizations showed a higher education level, a higher prevalence of admission in spring/summer with a significant peak in June, a longer duration of hospitalization and a lower suicide ideation. Among involuntary admissions, physical restraint and suicide attempts were more prevalent during spring compared to the other seasons. Conclusions: Seasonality has an important role in the psychopathology of psychiatric disorders, particularly in bipolar and related disorder, and may represent an influencing factor in hospital admissions and hospitalizations. Seasonal pattern must be considered while managing diagnosis and treatment of mental disorders, with regard to prevention and psychoeducation of patients.

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“…Existing literature has shown seasonal variations in the rates of hospital admissions for MDD across the world. A Polish study found that more hospitalizations for depression occurred during spring and autumn 4 . In Norway, admission rates for depression were highest in November for women while it was highest in April for men 5 .…”

Section: Introductionmentioning

confidence: 99%

Is there seasonality in hospitalizations for major depressive disorder in Canada?

Pillai

Richard

Shariff

et al. 2017

Arch. Clin. Psychiatry (São Paulo)

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Background: Canada, a temperate country with four defined seasons incurs an annual productivity loss of over $30 billion on major depressive disorder (MDD); however it remains unknown whether inpatient hospitalization for MDD exhibits seasonal variations. Objective: Our study objective was to determine if there are seasonal variations in hospitalization rates for MDD in Canada. Methods: We used time series analysis to determine monthly rates of hospitalizations for MDD from 2006 -2013, on data from population level health-administrative databases in Ontario, Canada. We also stratified analysis by gender and three age groups: 18 to 39, 40 to 65 and those over 65. We compared demographic and comorbidity profiles of patients admitted in April, August and December to elucidate if patient characteristics differed by season of admission. Results: We identified a total of 130,336 admissions for MDD for 95,439 unique patients. Baseline characteristics of the patients were similar across seasons. We did not detect significant seasonality of hospitalizations for MDD across any of the gender or age subgroups. Discussion: Our results question the popularly held belief that hospitalizations for MDD vary with seasons. These findings highlight the need for uniform hospital resource allocation for MDD throughout the year in Canada.

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

Cited by 42 publications

References 60 publications

Bipolar disorders: is there an influence of seasonality or photoperiod?

Bipolar disorders: is there an influence of seasonality or photoperiod?

Involuntary admissions in Italy: the impact of seasonality

Is there seasonality in hospitalizations for major depressive disorder in Canada?

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