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Long term exposure to road traffic noise and air pollution and risk of infertility in men and women: nationwide Danish cohort study
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Long term exposure to road traffic noise and air pollution and risk of infertility in men and women: nationwide Danish cohort study
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Long term exposure to road traffic noise and air pollution and risk of infertility in men and women: nationwide Danish cohort study
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Journal Article
Long term exposure to road traffic noise and air pollution and risk of infertility in men and women: nationwide Danish cohort study
2024
Overview
AbstractObjectiveTo investigate associations between long term residential exposure to road traffic noise and particulate matter with a diameter <2.5 µm (PM2.5) and infertility in men and women.DesignNationwide prospective cohort study.SettingDenmark.Participants526 056 men and 377 850 women aged 30-45 years, with fewer than two children, cohabiting or married, and residing in Denmark between 2000 and 2017.Main outcome measureIncident infertility in men and women during follow-up in the Danish National Patient Register.ResultsInfertility was diagnosed in 16 172 men and 22 672 women during a mean follow-up of 4.3 years and 4.2 years, respectively. Mean exposure to PM2.5 over five years was strongly associated with risk of infertility in men, with hazard ratios of 1.24 (95% confidence interval 1.18 to 1.30) among men aged 30-36.9 years and 1.24 (1.15 to 1.33) among men aged 37-45 years for each interquartile (2.9 µg/m3) higher PM2.5 after adjustment for sociodemographic variables and road traffic noise. PM2.5 was not associated with infertility in women. Road traffic noise (Lden, most exposed facade of residence) was associated with a higher risk of infertility among women aged 35-45 years, with a hazard ratio of 1.14 (1.10 to 1.18) for each interquartile (10.2 dB) higher five year mean exposure. Noise was not associated with infertility among younger women (30-34.9 years). In men, road traffic noise was associated with higher risk of infertility in the 37-45 age group (1.06, 1.02 to 1.11), but not among those aged 30-36.9 years (0.93, 0.91 to 0.96).ConclusionsPM2.5 was associated with a higher risk of an infertility diagnosis in men, whereas road traffic noise was associated with a higher risk of an infertility diagnosis in women older than 35 years, and potentially in men older than 37 years. If these results are confirmed in future studies, higher fertility could be added to the list of health benefits from regulating noise and air pollution.
Publisher
British Medical Journal Publishing Group,BMJ Publishing Group LTD
Subject
/ Air Pollution - adverse effects
/ Environmental Exposure - adverse effects
/ Female
/ Humans
/ Infertility, Female - epidemiology
/ Infertility, Female - etiology
/ Infertility, Male - epidemiology
/ Infertility, Male - etiology
/ Male
/ Noise, Transportation - adverse effects
/ Noise, Transportation - statistics & numerical data
/ Particulate Matter - adverse effects
/ Particulate Matter - analysis
/ Sperm
/ Stress
/ Traffic
