Institute of Cancer Epidemiology, Copenhagen, Denmark.
Am J Ind Med. 2010 Jul;53(7):757-61. doi: 10.1002/ajim.20837.
To investigate whether urban bus drivers are at increased risk for cancer.
Urban bus drivers in a cohort established in 1978 in the three largest cities of Denmark were followed-up in the Danish Cancer Registry until the end of 2003, and relative risks for cancers were estimated.
Of 2,037 men included 70% reported in 1978 that they smoked. The standardized incidence ratio (SIR) for cancer in comparison with that of other male residents of the three cities was 1.09 [1.0-1.2]. The excess was due mainly to increased risks for cancers of the bladder (SIR, 1.6; 1.2-2.0) and lung (1.2; 1.0-1.4). In an analysis with internal comparisons and adjustment for smoking, we found no significant associations between duration of employment and increased risks for cancers at these two sites.
In this long-term follow-up study we found little evidence of a causal association between employment as an urban bus driver in Denmark and subsequent cancer.
研究城市公交车司机是否具有更高的癌症发病风险。
1978 年在丹麦三个最大城市建立的队列中，对城市公交车司机进行了随访，随访至 2003 年底，并对癌症的相对风险进行了估计。
2037 名男性中，70%的人在 1978 年报告吸烟。与三个城市的其他男性居民相比，癌症的标准化发病比（SIR）为 1.09[1.0-1.2]。这种超额主要归因于膀胱癌（SIR 为 1.6；1.2-2.0）和肺癌（SIR 为 1.2；1.0-1.4）的风险增加。在一项内部比较分析和调整吸烟因素后，我们没有发现与这两个部位的癌症风险增加与就业年限之间存在显著关联。
在这项长期随访研究中，我们几乎没有发现丹麦城市公交车司机的职业与随后发生癌症之间存在因果关联的证据。
