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Which Environmental Factor Is Correlated with Long-Term Multiple Sclerosis Incidence Trends: Ultraviolet B Radiation or Geomagnetic Disturbances?
Joint Authors
Sajedi, Seyed Aidin
Abdollahi, Fahimeh
Source
Multiple Sclerosis International
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-24
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
Background.
Insufficient received ultraviolet B radiation (UV) is regarded as the main environmental risk factor (RF) for MS in vitamin D deficiency hypothesis.
Nevertheless, geomagnetic disturbance (GMD) has also been proposed as a potential trigger for MS in GMD hypothesis.
The aim of this study was to investigate which of these mentioned RF is correlated with long-term ultradecadal MS incidence.
Methods.
After a systematic search, long-term incidence reports of the United Kingdom (UK), Denmark, Tayside County, Nordland County, the Orkney, and Shetland Islands were selected for this retrospective time-series study.
Possible lead-lag relationships between MS incidence, GMD, and UV were evaluated by cross-correlation analysis.
Results.
Significant positive correlations between GMD and MS incidence were seen in Tayside County (at lag of 2 years: rS = 0.38), Denmark (peak correlation at lag of 2 years: rS = 0.53), and UK (at lag of 1 year: rS = 0.50).
We found a positive correlation between received UV and MS incidences in the Nordland at lag of 1 year (rS = 0.49).
Conclusion.
This study found significant positive correlations between alterations in GMD with alterations in long-term MS incidence in three out of six studied locations and supports the GMD hypothesis.
The observed significant correlation between MS and UV is positive; hence it is not supportive for UV related vitamin D deficiency hypothesis.
American Psychological Association (APA)
Sajedi, Seyed Aidin& Abdollahi, Fahimeh. 2017. Which Environmental Factor Is Correlated with Long-Term Multiple Sclerosis Incidence Trends: Ultraviolet B Radiation or Geomagnetic Disturbances?. Multiple Sclerosis International،Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1192846
Modern Language Association (MLA)
Sajedi, Seyed Aidin& Abdollahi, Fahimeh. Which Environmental Factor Is Correlated with Long-Term Multiple Sclerosis Incidence Trends: Ultraviolet B Radiation or Geomagnetic Disturbances?. Multiple Sclerosis International No. 2017 (2017), pp.1-11.
https://search.emarefa.net/detail/BIM-1192846
American Medical Association (AMA)
Sajedi, Seyed Aidin& Abdollahi, Fahimeh. Which Environmental Factor Is Correlated with Long-Term Multiple Sclerosis Incidence Trends: Ultraviolet B Radiation or Geomagnetic Disturbances?. Multiple Sclerosis International. 2017. Vol. 2017, no. 2017, pp.1-11.
https://search.emarefa.net/detail/BIM-1192846
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1192846