Table 1

List of cancer mortality studies, which were included in the analysis

No	Reference, country	Population	Follow-up, cancer cases	Type of exposure	Cancer outcomes	ERR per dose, β_ldrmd (Gy)⁻¹, best estimate and 90% CI
1	Boice 2006, USA18	Workers at Rocketdyne	−1999, 3066	External and internal	All cancer excluding leukaemia	0.0 (−1.9 to 2.4)*
2	Cardis 2007, 14 countries†16	Radiation workers in nuclear industry	Variable, 6119	External	All cancer excluding leukaemia	0.6 (−0.1 to 1.4)
3	Ivanov 2001, Russia‡21	Chernobyl clean-up workers	1991–1998, 515	External	Neoplasms ICD-9 140–239	2.1 (1.3 to 2.9)*
4	Ivanov 2006, Russia4	Chernobyl clean-up workers	1992–2002, 651	External	Solid cancer	1.5 (0.2 to 2.9)*
5	Krestinina 2005, Russia24	Techa River residents	−1999, 1842	External and internal	Solid cancer except bone cancer	0.9 (0.2 to 1.7)*
6	Muirhead 2009, UK6	Radiation workers	−2001, 6959	External	Malignant neoplasms excluding leukaemia	0.3 (0.02 to 0.6)
7	Stayner 2007, USA5	ORNL workers	−1984, 225	External	All cancer excluding leukaemia	4.8 (0.4 to 13.3)§
8	Telle-Lamberton 2007, France¶19	French nuclear workers	1968–1994, 721	External	All cancer excluding leukaemia	1.5 (−0.5 to 4.0)
9	Wing 2005, USA20	Hanford workers	−1994, 2265	External and internal	All cancer	0.3 (−0.3 to 1.0)

ERR, excess relative risk; ORNL, Oak Ridge National Laboratory.
*95% confidence interval.
†Canadian data excluded from 15-countries study.
‡Summarised by Ivanov et al25 in 2007, and therefore included in our analysis.
§After correction for dose uncertainties. The result without this correction is 5.4 (0.5 to 12.6) Gy⁻¹.
¶Results for “all cancer excluding leukaemia” were supplied by personal communication with Telle-Lamberton (2008).