Study type: Epidemiological study (observational study)

Effects of cell phone use on semen parameters: results from the MARHCS cohort study in Chongqing, China. epidem.

Published in: Environ Int 2016; 91: 116-121

Aim of study (acc. to author)

A cohort study was conducted in China to investigate the effects of mobile phone use on sperm quality among students.

Further details

Semen quality was assessed for each participant in 2013, 2014 and 2015 using four parameters (volume, concentration, total count, and motility) according to the criteria of the World Health Organization.

Endpoint/type of risk estimation

Type of risk estimation:

Exposure

Assessment

Population

Study size

Type Value
Total 872
Eligible 794
Other:

follow-up: 666 students in 2014 and 568 students in 2015

Statistical analysis method: ( adjustment: )

Conclusion (acc. to author)

For mobile phone use, the median daily duration of having the phone on was 12.5 h for all three years. The median daily talking durations were 30, 18, and 6 min for 2013, 2014, and 2015, respectively. The daily duration of internet use was 1.5 h in 2013. The monthly data traffic on the cellular network was 0.2 GB and 0.5 GB for 2014 and 2015, respectively.
After adjusting for potential confounders, significant associations between internet use and decreased sperm concentration and total sperm counts in 2013 and decreased semen volume in 2015 were observed. For all three years together, daily duration of talking on the mobile phone was found to be significantly associated with decreased sperm count. No significant association between mobile phone and internet use and sperm motility were observed.
The authors concluded that certain aspects of mobile phone use may negatively affect sperm quality in men by decreasing the semen volume, sperm concentration or sperm count.

Study funded by

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