Abstract
Objectives
To investigate the effect of a change in second-hand smoke (SHS) exposure on heart rate variability (HRV) and pulse wave velocity (PWV), this study utilized a quasi-experimental setting when a smoking ban was introduced.
Methods
HRV, a quantitative marker of autonomic activity of the nervous system, and PWV, a marker of arterial stiffness, were measured in 55 non-smoking hospitality workers before and 3–12 months after a smoking ban and compared to a control group that did not experience an exposure change. SHS exposure was determined with a nicotine-specific badge and expressed as inhaled cigarette equivalents per day (CE/d).
Results
PWV and HRV parameters significantly changed in a dose-dependent manner in the intervention group as compared to the control group. A one CE/d decrease was associated with a 2.3 % (95 % CI 0.2–4.4; p = 0.031) higher root mean square of successive differences (RMSSD), a 5.7 % (95 % CI 0.9–10.2; p = 0.02) higher high-frequency component and a 0.72 % (95 % CI 0.40–1.05; p < 0.001) lower PWV.
Conclusions
PWV and HRV significantly improved after introducing smoke-free workplaces indicating a decreased cardiovascular risk.
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Acknowledgments
The authors thank Vicki Schweigler, Rebecca Patuto, Céline Bürgi, Melisa Calabrese and Alexander Wieg for their contributions to the data collection. This work was supported by the Swiss Tobacco Prevention Fund (grant number 09.002032). Dr. Wellenius was funded by grant R00-ES015774 from the National Institute of Environmental Health Sciences (NIEHS), NIH.
Conflict of interest
The authors declare that they have no conflict of interest.
Ethics Statement
Ethical approval was obtained from the EKBB (Ethics committee of both cantons of Basel) and all participants signed an informed consent before every examination (Ref. No. EK 317/09).
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Rajkumar, S., Schmidt-Trucksäss, A., Wellenius, G.A. et al. The effect of workplace smoking bans on heart rate variability and pulse wave velocity of non-smoking hospitality workers. Int J Public Health 59, 577–585 (2014). https://doi.org/10.1007/s00038-014-0545-y
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DOI: https://doi.org/10.1007/s00038-014-0545-y