Mortality in the French cohort of nuclear workers

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This article has a note: [https://doi.org/10.1051/radiopro/2017019]

Table 3

Variation of the standardized mortality ratios (SMR^a) for pleural cancer and malignant skin melanoma in the French nuclear worker cohort, 1968–2004.

	Pleural cancer					Skin melanoma

	n	SMR	95%CI	p_h	p_t	n	SMR	95%CI	p_h	p_t
Company
CEA	33	1.74	1.20–2.44	0.84	–	31	1.55	1.05–2.19	0.17	–
AREVA NC	1	0.78	0.01–4.34			3	1.38	0.28–4.03
EDF	7	1.87	0.75–3.85			5	0.69	0.22–1.61
Other	2	1.35	0.15–4.87			5	2.66	0.86–6.20
Socioeconomic status
Managers and engineers	6	1.14	0.42–2.48	0.43	–	9	1.38	0.63–2.63	0.74	–
Administrative employees	2	0.91	0.10–3.29			6	2.07	0.75–4.49
Skilled workers	24	2.07	1.33–3.08			19	1.23	0.74–1.92
Unskilled workers	11	1.77	0.88–3.17			9	1.43	0.65–2.71
Unknown	0					1
Year of hiring
<1960	18	2.13	1.26–3.36	–	0.05	4	0.54	0.15–1.39	–	0.65
1960–1969	23	1.76	1.12–2.64			29	2.08	1.39–2.99
1970–1979	1	0.56	0.01–3.10			3	0.69	0.14–2.02
≥ 1980	1	0.46	0.01–2.57			8	1.39	0.60–2.74
Age at hiring (years)
<25	9	1.30	0.59–2.47	–	0.85	16	1.32	0.75–2.14	–	0.32
25–34	22	2.05	1.28–3.10			14	1.10	0.60–1.85
35–44	9	1.55	0.71–2.94			12	2.39	1.23–4.17
≥ 45	3	1.49	0.30–4.37			2	1.29	0.15–4.67
Duration of employment (years)
<10	3	0.71	0.14–2.07	–	0.04	15	2.15	1.20–3.55	–	0.01
10–19	9	1.37	0.62–2.60			16	1.77	1.01–2.87
≥ 20	31	2.11	1.44–3.00			13	0.85	0.45–1.45
Cumulative photon dose (mSv)
<5	26	1.66	1.09–2.44	–	0.81	29	1.49	1.00–2.14	–	0.25
5-9	3	1.61	0.32–4.70			5	2.09	0.67–4.88
10–19	2	0.96	0.11–3.48			5	1.89	0.61–4.41
20–49	8	2.85	1.23–5.62			2	0.59	0.07–2.12
≥ 50	4	1.29	0.35–3.30			3	0.87	0.18–2.55

standardized on calendar period, age, and sex. n number of observed deaths in the cohort. CI: confidence interval. p_h: bilateral p-value of the heterogeneity test, after excluding the unknown category for socioeconomic status. p_t: bilateral p-value of the χ²_{(1 df)} Poisson trend test.

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