Circulatory disease mortality is slightly lower in drivers (SMR = 0.87); however, mortality from acute myocardial infarction shows an elevation (O = 41, SMR = 1.27) but is not quite statistically significant (95% CI = 0.91,1.72).
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A retrospective mortality study among Canadian petroleum marketing and distribution workers.
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Thus, a strong trend of increasing risk with tenure is not apparent in tank truck drivers, although small numbers limit the detection of such trends.
Thus, though the patterns of risk are consistent with a possible risk due to HC exposure, the limited number of observed and expected deaths are only suggestive and do not allow a concise interpretation. Other relevant kidney cancer studies include a population-based case-control study among renal cell can- cer cases (31), in which a slight trend of increasing odds ratios was found for gas station attendants.