Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Biological Clocks and Seasonal Responses02:45

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
Assumptions of Survival Analysis01:15

Assumptions of Survival Analysis

Survival models analyze the time until one or more events occur, such as death in biological organisms or failure in mechanical systems. These models are widely used across fields like medicine, biology, engineering, and public health to study time-to-event phenomena. To ensure accurate results, survival analysis relies on key assumptions and careful study design.
Depressive Disorders: Etiology01:27

Depressive Disorders: Etiology

Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
Actuarial Approach01:20

Actuarial Approach

The actuarial approach, a statistical method originally developed for life insurance risk assessment, is widely used to calculate survival rates in clinical and population studies. This method accounts for participants lost to follow-up or those who die from causes unrelated to the study, ensuring a more accurate representation of survival probabilities.
Consider the example of a high-risk surgical procedure with significant early-stage mortality. A two-year clinical study is conducted,...
Psychological and Sociocultural Causes of Schizophrenia01:29

Psychological and Sociocultural Causes of Schizophrenia

Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
Survival Curves01:18

Survival Curves

Survival curves are graphical representations that depict the survival experience of a population over time, offering an intuitive way to track the proportion of individuals who remain event-free at each time point. These curves are widely used in fields such as medicine, public health, and reliability engineering to visualize and compare survival probabilities across different groups or conditions.
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Inclusive Search for Anomalous Single-Photon Production in MicroBooNE.

Physical review letters·2026
Same author

First Search for Dark Sector e^{+}e^{-} Explanations of the MiniBooNE Anomaly at MicroBooNE.

Physical review letters·2026
Same author

First Measurement of Charged-Current Muon-Neutrino-Induced K^{+} Production on Argon Using the MicroBooNE Detector.

Physical review letters·2026
Same author

First national study on genomic profiling of <i>Escherichia coli</i> in United Arab Emirates (UAE) aquatic environments shows diverse Quinolone and Cephalosporin resistance.

Environmental challenges (Amsterdam, Netherlands)·2025
Same author

Search for an Anomalous Production of Charged-Current ν_{e} Interactions without Visible Pions across Multiple Kinematic Observables in MicroBooNE.

Physical review letters·2025
Same author

EMC Effect of Tritium and Helium-3 from the JLab MARATHON Experiment.

Physical review letters·2025

Related Experiment Video

Updated: May 30, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

Suicide and seasonality.

C Christodoulou1, A Douzenis, F C Papadopoulos

  • 1Second Department of Psychiatry, University of Athens Medical School, Attikon Hospital, Athens, Greece. christo.christodoulou@gmail.com

Acta Psychiatrica Scandinavica
|August 16, 2011
PubMed
Summary
This summary is machine-generated.

Seasonal suicide rates show a spring peak, especially for men and older adults using violent methods. Understanding these patterns is key for suicide prevention efforts globally.

More Related Videos

A New Method for Inducing a Depression-Like Behavior in Rats
07:57

A New Method for Inducing a Depression-Like Behavior in Rats

Published on: February 22, 2018

Related Experiment Videos

Last Updated: May 30, 2026

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
10:46

A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data

Published on: December 9, 2015

A New Method for Inducing a Depression-Like Behavior in Rats
07:57

A New Method for Inducing a Depression-Like Behavior in Rats

Published on: February 22, 2018

Area of Science:

  • Epidemiology
  • Public Health
  • Psychiatry

Background:

  • Seasonal variations in suicide deaths offer critical insights into suicide determinants.
  • Understanding these patterns is essential for developing effective suicide prevention strategies.

Purpose of the Study:

  • To review and synthesize existing literature on suicide seasonality.
  • To identify patterns and influencing factors associated with seasonal suicide trends.

Main Methods:

  • Conducted a literature review of studies on suicide seasonality.
  • Assessed articles published between 1979 and 2009.

Main Results:

  • A majority of studies confirm a spring peak in suicides, particularly among men, older individuals, and those using violent methods.
  • A secondary peak is observed in autumn; however, no consistent seasonality pattern exists for specific suicide methods.
  • Inconsistent findings regarding seasonal variation were reported, with some studies showing reduced, unchanged, or increased seasonality. Factors like sex, age, method, clinical, bioclimatic, sociodemographic, and biological influences appear to affect seasonal suicide patterns.

Conclusions:

  • Seasonal patterns in suicide are reported in both the Northern and Southern hemispheres.
  • These epidemiological findings contribute to a global effort to understand the complex factors underlying suicidal behavior.