TY - JOUR T1 - Healthy worker effects explain differences in internal and external comparisons in a rubber industry cohort study JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 781 LP - 781 DO - 10.1136/oemed-2019-106083 VL - 76 IS - 10 AU - Mira Hidajat AU - Damien Martin McElvenny AU - Peter Ritchie AU - Andrew Darnton AU - William Mueller AU - Martie van Tongeren AU - Raymond M Agius AU - John W Cherrie AU - Frank de Vocht Y1 - 2019/10/01 UR - http://oem.bmj.com/content/76/10/781.abstract N2 - In his letter, Professor Sorahan1 poses an important question about our paper,2 namely, whether the results indicate that occupational exposures to agents such as rubber dust, rubber fumes and nitrosamines in the rubber industry are associated with increased risk of mortality from cancers of the bladder, lung, stomach, oesophagus, prostate, larynx, brain, pancreas, liver, and lymphatic and haematopoietic tissue. Sorahan argues that causation does not seem to be warranted since results from … ER -