Objective: Within the framework of the HYENA project we investigated the effect of short-term changes of noise levels (transportation or indoor noise) on blood pressure (BP) level during nighttime sleep in a field study. Material and Methods: Twenty-four-hour ambulatory BP measurements (ABPM) at 15-minute intervals were carried out on 140 persons living near 4 major European airports taking part in the HYENA project. Noise was measured continuously during the study subjects’ night sleeping period (identified via sleep log) in their bedroom with a noise-meter sampling every 125 milliseconds and recorded on a digital MP3 recorder. Playback on a PC was used subsequently for identification of the source of noise events. Exposure variables included equivalent indoor noise level over 1 and 15 minutes before each BP measurement and presence/absence of event (defined when indoor LAmax >35 dB) before BP measurement. Random effects models were applied with multiple night-time BP values for each participant as outcome. Results: The pooled effects from all 4 centers show that the measured noise 15 and 1 minutes before the systolic and diastolic BP measurement is associated with higher BP in all 4 samples and the association is statistically significant (P < 0.05). Moreover, the presence of an aircraft event, irrespective of its noise level, is associated with a statistically significant increase in diastolic BP. Conclusions: The effects of noise exposure on elevated subsequent BP measurements are clearly shown in our results. More specifically an aircraft noise event is practically associated with elevated BP.
Acute effects of night time noise exposure on blood pressure in populations living near airports
VIGNA-TAGLIANTI, Federica;
2008-01-01
Abstract
Objective: Within the framework of the HYENA project we investigated the effect of short-term changes of noise levels (transportation or indoor noise) on blood pressure (BP) level during nighttime sleep in a field study. Material and Methods: Twenty-four-hour ambulatory BP measurements (ABPM) at 15-minute intervals were carried out on 140 persons living near 4 major European airports taking part in the HYENA project. Noise was measured continuously during the study subjects’ night sleeping period (identified via sleep log) in their bedroom with a noise-meter sampling every 125 milliseconds and recorded on a digital MP3 recorder. Playback on a PC was used subsequently for identification of the source of noise events. Exposure variables included equivalent indoor noise level over 1 and 15 minutes before each BP measurement and presence/absence of event (defined when indoor LAmax >35 dB) before BP measurement. Random effects models were applied with multiple night-time BP values for each participant as outcome. Results: The pooled effects from all 4 centers show that the measured noise 15 and 1 minutes before the systolic and diastolic BP measurement is associated with higher BP in all 4 samples and the association is statistically significant (P < 0.05). Moreover, the presence of an aircraft event, irrespective of its noise level, is associated with a statistically significant increase in diastolic BP. Conclusions: The effects of noise exposure on elevated subsequent BP measurements are clearly shown in our results. More specifically an aircraft noise event is practically associated with elevated BP.
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