Study type: Epidemiological study (observational study)

Pregnancy outcomes after paternal radiofrequency field exposure aboard fast patrol boats. epidem.

Published in: J Occup Environ Med 2012; 54 (4): 431-438

Aim of study (acc. to author)

Pregnancy outcomes after paternal radiofrequency electromagnetic field exposure aboard fast patrol boats were investigated in a cohort study in Norway.

Further details

The Medical Birth Registry of Norway and the register of the Royal Norwegian Navy were linked by means of the mother's and father's personal ID numbers to find all pregnancies involving parents in the Royal Norwegian Navy.
Exposure during the last 3 months before conception (acute) and exposure more than 3 months before conception (nonacute) were analyzed.

Endpoint/type of risk estimation

Type of risk estimation: (relative risk (RR))

Exposure

Assessment

Exposure groups

Group Description
Reference group 1 land-based exposure
Group 2 acute exposure on vessels (3 month prior conception), subdivided into groups 4-8
Group 3 nonacute exposure on vessels (more than 3 months prior conception), subdivided into groups 9-13
Reference group 4 acute exposure on other vessels excluding fast patrol boats
Group 5 acute exposure on fast patrol boats
Group 6 acute exposure on fast patrol boats, radiofrequency dose: low
Group 7 acute exposure on fast patrol boats, radiofrequency dose: medium
Group 8 acute exposure on fast patrol boats, radiofrequency dose: high
Reference group 9 nonacute exposure on other vessels excluding fast patrol boats
Group 10 nonacute exposure on fast patrol boats
Group 11 nonacute exposure on fast patrol boats, radiofrequency dose: low
Group 12 nonacute exposure on fast patrol boats, radiofrequency dose: medium
Group 13 nonacute exposure on fast patrol boats, radiofrequency dose: high

Population

Study size

Type Value
Total 37,920
Statistical analysis method: ( adjustment: )

Conclusion (acc. to author)

The results showed an increased risk of perinatal mortality and pregnancies complicated by preeclampsia after paternal service aboard fast patrol boats during a 3-month preconception period compared with work aboard other vessels. The same was seen among servicemen with an estimated radiofrequency exposure dose aboard fast patrol boats (groups 6-8), but there was no clear dose-response relationship. No associations were found between nonacute exposure and any of the reproductive outcomes.
The authors concluded that paternal work aboard fast patrol boats during an acute period was associated with perinatal mortality and preeclampsia but the cause is not clear.

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