Study type: Epidemiological study (observational study)

Memory loss risk assessment for the students nearby high-voltage power lines-a case study. epidem.

Published in: Environ Monit Assess 2016; 188 (6): 355

Aim of study (acc. to author)

A cross-sectional study was conducted in Iran to examine the working memory of students exposed to extremely low frequency magnetic fields from high-voltage transmission lines and substations.

Further details

The status of working memory in the students was determined by the digit span test and the letter-number sequencing test (Wechsler Intelligence Scale for Children).

Endpoint/type of risk estimation

Type of risk estimation:

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 2 schools in a distance of 610 m and 1390 m to a high-voltage substation
Group 2 2 schools in a distance of 30 m and 50 m to a high-voltage substation

Population

Study size

Type Value
Total 176
Other:

74 boys in group 1 and 102 in group 2

Statistical analysis method:

Conclusion (acc. to author)

The average magnetic flux density was 0.245 µT at the schools in a distance of 30 m and 50 m to a high-voltage substation and 0.164 µT at schools in a distance of 610 m and 1390 m.
The results showed that boys of schools in a distance of 610 m and 1390 m to a high-voltage substation had better working memory compared to boys of the schools in a distance of 30 m and 50 m.
The authors concluded that extremely low frequency magnetic field exposure may have a negative impact on the working memory of children.

Study funded by

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