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Occupational Noise Exposure, Bilateral High-Frequency Hearing Loss, and Blood Pressure
1Environmental Health Services, British Columbia Center for Disease Control, Vancouver, British Columbia, Canada (Dr Gan), and Department of Preventive Medicine and Environmental Health, College of Public Health, University of Kentucky, Lexington, Kentucky (Drs Gan, Mannino).
Objective:
The aim of this study was to investigate the relationships between occupational noise exposure and blood pressure using self-reported occupational exposure and bilateral high-frequency hearing loss.
Methods:
This study included 4548 participants aged 20 to 69 years from the National Health and Nutrition Examination Survey 1999 to 2004. On the basis of self-reported exposure status, participants were divided into the current, former, or never exposed groups. Bilateral high-frequency hearing loss was defined as the average high-frequency hearing threshold at least 25 dB in both ears.
Results:
The currently exposed participants had slightly increased diastolic blood pressure compared with those never exposed. Among previously exposed participants, those with bilateral high-frequency hearing loss had increased systolic blood pressure, heart rate, and the prevalence of hypertension compared with those with normal high-frequency hearing.
Conclusion:
Although there were some significant results, the evidence was not consistent to support the associations between occupational noise exposure and blood pressure.
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Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Measurement of Blood Pressure
Hypertension and Regulation of Blood Pressure
Factors affecting Blood pressure
Physiological Factors:
Blood Pressure
The average BP in an adult is typically around 120/80 mmHg (millimeters of mercury). In this measurement, the numerator (120) indicates the systolic pressure, which is the pressure in the arteries during the contraction of the heart's ventricles as blood is expelled. The denominator (80) represents the...
Blood Pressure

