Table 3. Relative risk for selected cancer sites by cumulative radon exposure based on internal poisson regression, 1960–2003.

Cancer site (ICD-10 code)	Cumulative radon exposure in working level months (WLM)
		0	0–49	50–99	100–499	500–999	−1499	⩾1500	Total	ERR/100 WLMa	P-value
Tongue and mouth	Cases	3	12	5	11	1	6	0	38	0.045	0.50
(C01–C06)	RRb	1.00	1.30	3.10	3.12	0.43	6.15	—
Pharynx	Cases	6	16	2	10	12	6	1	53	0.163	0.12
(C09–C14)	RR	1.00	0.97	0.54	1.27	2.85	3.33	1.18
Oesophagus	Cases	19	38	7	37	15	6	3	125	−0.025	0.08
(C15)	RR	1.00	0.97	0.76	1.31	0.82	0.69	0.68
Stomach	Cases	76	143	35	141	95	62	38	590	0.021c	0.04
(C16)	RR	1.00	1.21	1.42	1.34	1.16	1.51	1.77c
Colon	Cases	51	74	13	66	41	44	10	299	0.017	0.26
(C17–C18)	RR	1.00	0.79	0.63	0.84	0.71	1.58	0.71
Rectum	Cases	39	55	16	53	39	22	17	241	0.028	0.13
(C19–C21)	RR	1.00	0.77	0.97	0.91	0.89	1.03	1.58
Liver	Cases	25	35	12	24	34	21	7	158	0.044	0.09
(C22)	RR	1.00	0.70	1.10	0.59	1.18	1.52	1.02
Gallbladder	Cases	15	17	3	19	12	9	6	81	0.021	0.46
(C23–C24)	RR	1.00	0.70	0.57	0.85	0.70	1.05	1.37
Pancreas	Cases	38	60	11	51	43	16	9	228	−0.001	>0.5
(C25)	RR	1.00	0.81	0.70	0.93	1.04	0.78	0.86
Larynx	Cases	13	15	2	16	20	8	1	75	0.021	0.49
(C32)	RR	1.00	0.66	0.40	0.92	1.51	1.23	0.29
Prostate	Cases	50	60	12	62	42	20	17	263	0.000	>0.5
(C61)	RR	1.00	0.85	0.81	0.88	0.75	0.71	1.20
Kidney	Cases	26	44	12	42	23	13	11	171	0.017	0.39
(C64–C66)	RR	1.00	0.83	0.96	1.01	0.79	0.92	1.60
Bladder	Cases	22	34	10	42	39	22	8	177	0.020	0.28
(C67–C68)	RR	1.00	1.03	1.47	1.26	1.44	1.60	1.15
Brain and others	Cases	15	41	9	18	22	10	0	115	−0.018	0.27
(C70–C72)	RR	1.00	1.32	1.33	0.85	1.56	1.52	—
Non-Hodgkin's disease	Cases	14	22	8	18	13	9	3	87	0.032	0.35
(C82–C85 and C91.4)	RR	1.00	0.71	1.34	1.00	1.05	1.54	1.05
Myeloma	Cases	13	11	2	14	7	7	1	55	0.007	>0.5
(C90)	RR	1.00	0.40	0.37	0.82	0.56	1.22	0.34
Leukaemia	Cases	22	29	5	36	17	14	4	127	0.006	>0.5
(C91–C95, excluding C91.4)	RR	1.00	0.75	0.57	1.13	0.75	1.26	0.71
Other and unspecified	Cases	75	137	24	93	74	31	23	457	0.009	0.44
	RR	1.00	0.96	0.84	0.90	1.01	0.86	1.29
All non-lung cancers	Cases	522	843	188	753	549	326	159	3340	0.014c	<0.001
(C00–C32, C35–C97)	RR	1.00	0.89c	0.94	1.00	0.99	1.20c	1.16
Person-years at risk	0-year lag	256 264	781 696	102 726	290 243	191 867	92 371	47 019	1 762 208
	5-year lag	363 845	693 782	95 229	287 756	191 037	86 643	43 913	1 762 208
Mean cumulative radon exposure		0	11.1	71.9	263.4	732.1	1197.2	1940.8

^aERR/WLM=excess relative risk per working level months.

^bRR=relative risk.

^cStatistically significant (P<0.05).