Related Experiment Video
Updated: Jul 12, 2026

07:03
A Low Mortality Rat Model to Assess Delayed Cerebral Vasospasm After Experimental Subarachnoid Hemorrhage
Published on: January 17, 2013
Risk factors for mortality in the Bangladesh cyclone of 1991
C Bern1, J Sniezek, G M Mathbor
1Respiratory and Enteric Virus Branch, Centers for Disease Control, Atlanta, GA 30333.
Bulletin of the World Health Organization
|January 1, 1993
Summary
Cyclone-related deaths in Bangladesh disproportionately affect children and older women. Seeking refuge in concrete structures significantly improves survival rates during cyclones.
Area of Science:
- Epidemiology
- Disaster Management
- Public Health
Background:
- Cyclones pose a significant and ongoing threat to coastal populations in Bangladesh.
- Despite advancements in disaster control, cyclone-related mortality remains a critical issue, as evidenced by the 138,000 deaths in the April 1991 cyclone.
Purpose of the Study:
- To conduct a rapid epidemiological assessment following the 1991 cyclone.
- To identify key factors contributing to cyclone-related mortality.
- To inform the development of effective prevention strategies.
Main Methods:
- A nonrandom survey was conducted across 45 housing clusters, involving 1123 individuals.
- Data collection focused on demographic factors and survival outcomes related to cyclone exposure.
Main Results:
- Mortality rates were highest among children under 10 years (26%) and women over 40 years (31%).
- A stark survival difference was observed: 22% of individuals not reaching concrete or brick structures died, while all those who did survive.
Conclusions:
- Enhanced cyclone warnings and earlier response are crucial for reducing future mortality.
- Improved access to designated cyclone shelters and community preparedness are vital.
- Special attention to vulnerable groups, including children and women, during warnings and evacuations is essential for mitigating deaths.
Keywords:
AsiaBangladeshBiologyChild MortalityDemographic FactorsDeveloping CountriesEconomic FactorsEnvironmentHealth And Welfare PlanningMortalityNatural DisasterOperations ResearchOrganization And AdministrationPopulationPopulation DynamicsProgram EvaluationProgramsResearch MethodologyRisk FactorsSampling StudiesSocial PlanningSouthern AsiaStudiesSurveysRelated Concept Videos
Factors Affecting Illness
When a person's physical, emotional, intellectual, social development or spiritual functioning is compromised, this deviation from a healthy normal state is called illness. Illness creates stress that in turn harms individuals. Irritation, anger, denial, hopelessness, and fear are behavioral and emotional changes an individual experiences in the phases of illness. A variety of factors influence a person's health and well-being.
For instance, risk factors are connected to illness, disability,...
For instance, risk factors are connected to illness, disability,...
Drug Toxicity: Risk factors
Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
Criteria for Causality: Bradford Hill Criteria - I
The Bradford Hill criteria are a group of principles that provide a framework to determine a causal relationship between a specific factor and a disease. There are nine criteria that are pivotal in assessing causality in epidemiological studies. Here's a closer look at Strength, Consistency, Specificity, and Temporality criteria with definitions and examples:
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.
Hazard Rate
The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...
Cholera
Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...