Fig. 1

Analysis of the individual studies. Linear regression with fixed effects for log RR with weights proportional to the inverse of the respective variance (represented by box size). Coefficients (effect size, ES) of the cumulative exposure (Dose) to DEE in mg/m³-years with a 95 % confidence interval for the coefficient, calculated using the standard normal distribution. Steenland et al. [2] and Silverman et al. [4] were evaluated as used by Vermeulen et al. [1] as well as in accordance with the re-analysis by Crump et al. [14] with adjustment for the radon exposure (REC4, REC6, cf. Table 3), as was Garshick et al. [3] as used by Vermeulen et al. [1], and Garshick et al. [3] (modified) and the data based on Möhner et al. [17] (adapted)