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Environ Health Perspect

Title:		Air pollution from industrial swine operations and blood pressure of neighboring residents
Author(s):		Wing S; Horton RA; Rose KM;
Address:		"Department of Epidemiology, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina 27599-7400, USA. steve_wing@unc.edu"
Journal Title:		Environ Health Perspect
Year:		2013
Volume:		20121028
Issue:		1
Page Number:		92 - 96
DOI:		10.1289/ehp.1205109
ISSN/ISBN:		1552-9924 (Electronic) 0091-6765 (Print) 0091-6765 (Linking)
Abstract:		"BACKGROUND: Industrial swine operations emit odorant chemicals including ammonia, hydrogen sulfide (H2S), and volatile organic compounds. Malodor and pollutant concentrations have been associated with self-reported stress and altered mood in prior studies. OBJECTIVES: We conducted a repeated-measures study of air pollution, stress, and blood pressure in neighbors of swine operations. METHODS: For approximately 2 weeks, 101 nonsmoking adult volunteers living near industrial swine operations in 16 neighborhoods in eastern North Carolina sat outdoors for 10 min twice daily at preselected times. Afterward, they reported levels of hog odor on a 9-point scale and measured their blood pressure twice using an automated oscillometric device. During the same 2- to 3-week period, we measured ambient levels of H2S and PM10 at a central location in each neighborhood. Associations between systolic and diastolic blood pressure (SBP and DBP, respectively) and pollutant measures were estimated using fixed-effects (conditional) linear regression with adjustment for time of day. RESULTS: PM10 showed little association with blood pressure. DBP [beta (SE)] increased 0.23 (0.08) mmHg per unit of reported hog odor during the 10 min outdoors and 0.12 (0.08) mmHg per 1-ppb increase of H2S concentration in the same hour. SBP increased 0.10 (0.12) mmHg per odor unit and 0.29 (0.12) mmHg per 1-ppb increase of H2S in the same hour. Reported stress was strongly associated with BP; adjustment for stress reduced the odor-DBP association, but the H2S-SBP association changed little. CONCLUSIONS: Like noise and other repetitive environmental stressors, malodors may be associated with acute blood pressure increases that could contribute to development of chronic hypertension"
Keywords:		Air Pollutants/*toxicity Air Pollution/*adverse effects Animals Blood Pressure/*drug effects Industrial Waste/*adverse effects Particulate Matter/*toxicity *Swine;
Notes:		"MedlineWing, Steve Horton, Rachel Avery Rose, Kathryn M eng P30 ES010126/ES/NIEHS NIH HHS/ R01 ES011359/ES/NIEHS NIH HHS/ T32 ES007018/ES/NIEHS NIH HHS/ 5-T32-ES07018/ES/NIEHS NIH HHS/ Research Support, N.I.H., Extramural Research Support, U.S. Gov't, Non-P.H.S. 2012/11/01 Environ Health Perspect. 2013 Jan; 121(1):92-6. doi: 10.1289/ehp.1205109. Epub 2012 Oct 28"