TY - JOUR T1 - Letter commentary on: Lung cancer mortality in the French cohort of titanium dioxide workers: some aetiological insights JF - Occupational and Environmental Medicine JO - Occup Environ Med DO - 10.1136/oemed-2020-107280 SP - oemed-2020-107280 AU - John Andrew Tomenson Y1 - 2021/02/21 UR - http://oem.bmj.com/content/early/2021/02/21/oemed-2020-107280.abstract N2 - Dear Editor,Guseva Canu et al1 examined exposure–response in 833 workers from one of two French plants included in a European cohort of over 14 000 male TiO2 workers.2 Dose–response was reported solely for the pooled European cohort by Boffetta et al,2 but was investigated for this small French group (see table 1).3View this table:In this windowIn a new windowTable 1 Relative risk (RR) (95% CI) of mortality from lung cancer for estimated cumulative exposure to respirable TiO2 dustNo adjustment for smoking was made in the original analyses, but little reliance can be placed on the multiple imputation results reported here. An implausible 43 (8.4%) of 512 workers with known smoking status were stated to be current smokers. Given that smoking status was only ascertained for 33 … ER -