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Heart Disease Mortality Among Bridge and Tunnel Officers Exposed to Carbon Monoxide.

PB90131376

Publication Date	1989
Personal Author	Stern, F. B.; Halperin, W. E.; Hornung, R. W.; Ringenburg, V. L.; McCammon, C. S.
Page Count	38
Abstract	A retrospective study was conducted of 5529 New York City bridge and tunnel officers to determine the effect of occupational exposure to carbon-monoxide (630080) (CO) with specific reference to heart disease mortality. Continuous monitoring of CO within the tunnels operated by the Triborough Bridge and Tunnel Authority began in 1940. In 1961 the 24 hour average CO concentrations inside the tunnels were 53 parts per million (ppm) in the summer and 49ppm in the winter with peaks of 200 to 300ppm in the summer and 100 to 200ppm in the winter. Monitoring in 1970 indicated CO levels of 63ppm in tunnel toll booths and 13ppm in bridge toll booths. In 1977 ventilation equipment which had been installed was linked to continuously reading CO monitors. Peak 1981 CO exposures in the traffic lanes of both the tunnel and bridge and on the tunnel catwalk were often greater than 100ppm and sometimes surpassed 400ppm. Arteriosclerotic heart disease (ASHD) was the cause of death in 61 former tunnel officers as compared to the expected number of 45. A Cox proportional hazards model was used to compare the risk of mortality from ASHD among tunnel officers to the less exposed bridge officers. While there was a significant association between exposure and age, no association of ASHD was noted with length of exposure.
Keywords	Carbon monoxide Heart diseases Occupational diseases Exposure Monitors Vehicular tunnels Statistical analysis Exhaust emissions Risk assessment Retrospective studies CAS 630-08-0
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 57E - Clinical Medicine 57Y - Toxicology
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Div. of Surveillance, Hazard Evaluations and Field Studies.
Document Type	Technical Report
NTIS Issue Number	199006

Heart Disease Mortality Among Bridge and Tunnel Officers Exposed to Carbon Monoxide.

Heart Disease Mortality Among Bridge and Tunnel Officers Exposed to Carbon Monoxide.
PB90131376

Publication Date	1989
Personal Author	Stern, F. B.; Halperin, W. E.; Hornung, R. W.; Ringenburg, V. L.; McCammon, C. S.
Page Count	38
Abstract	A retrospective study was conducted of 5529 New York City bridge and tunnel officers to determine the effect of occupational exposure to carbon-monoxide (630080) (CO) with specific reference to heart disease mortality. Continuous monitoring of CO within the tunnels operated by the Triborough Bridge and Tunnel Authority began in 1940. In 1961 the 24 hour average CO concentrations inside the tunnels were 53 parts per million (ppm) in the summer and 49ppm in the winter with peaks of 200 to 300ppm in the summer and 100 to 200ppm in the winter. Monitoring in 1970 indicated CO levels of 63ppm in tunnel toll booths and 13ppm in bridge toll booths. In 1977 ventilation equipment which had been installed was linked to continuously reading CO monitors. Peak 1981 CO exposures in the traffic lanes of both the tunnel and bridge and on the tunnel catwalk were often greater than 100ppm and sometimes surpassed 400ppm. Arteriosclerotic heart disease (ASHD) was the cause of death in 61 former tunnel officers as compared to the expected number of 45. A Cox proportional hazards model was used to compare the risk of mortality from ASHD among tunnel officers to the less exposed bridge officers. While there was a significant association between exposure and age, no association of ASHD was noted with length of exposure.
Keywords	Carbon monoxide Heart diseases Occupational diseases Exposure Monitors Vehicular tunnels Statistical analysis Exhaust emissions Risk assessment Retrospective studies CAS 630-08-0
Source Agency	National Institute for Occupational Safety and Health
NTIS Subject Category	57U - Public Health & Industrial Medicine 57E - Clinical Medicine 57Y - Toxicology
Corporate Authors	National Inst. for Occupational Safety and Health, Cincinnati, OH. Div. of Surveillance, Hazard Evaluations and Field Studies.
Document Type	Technical Report
NTIS Issue Number	199006