Related Experiment Video
Updated: Apr 28, 2026
10:46
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
10.3K
Smoking and multiple sclerosis: evidence for latitudinal and temporal variation
1School of Medicine, Griffith University, Gold Coast, QLD, 4222, Australia.
Journal of Neurology
|June 14, 2014
Summary
Smoking is consistently linked to an increased risk of developing multiple sclerosis (MS), with males facing a higher risk. Environmental factors like latitude and vitamin D deficiency may also influence MS development, particularly in women.
Area of Science:
- Neurology
- Epidemiology
Background:
- Growing evidence suggests smoking contributes to multiple sclerosis (MS) etiology.
- Existing meta-analyses require expansion to fully understand risk factors.
Purpose of the Study:
- To investigate the association between smoking and MS risk.
- To explore the influence of study design, gender, latitude, and year on this association.
Main Methods:
- Expanded existing meta-analyses.
- Utilized regression modeling to analyze risk factors.
- Examined the impact of gender, latitude, and study year.
Main Results:
- A consistent association between smoking and MS was found, with an odds ratio of approximately 1.5.
- Males exhibited a higher risk compared to females.
- Latitude and year of study showed unexpected influences, with greater risk for females closer to the equator and a potential increase in risk over time.
Conclusions:
- Smoking is a significant environmental risk factor for MS.
- MS risk appears to follow a threshold model, influenced by genetics and environmental factors like vitamin D deficiency.
- Women may have an intrinsically lower threshold for MS development, making them more susceptible to environmental risks.
Related Concept Videos
01:19Multiple Sclerosis l: Introduction
17
Multiple sclerosis is a chronic autoimmune disease of the central nervous system (CNS) that affects the brain, spinal cord, and optic nerves. It is an inflammatory demyelinating disorder and a leading cause of neurological disability in young adults.EpidemiologyMS commonly begins between 20 and 40 years of age and is twice as common in women. Its exact cause remains unclear, but genetic susceptibility contributes, with higher risk in first-degree relatives and identical twins. A greater...
17
02:20Longitudinal Research
11.7K
Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
11.7K