Table 4. Age groups of miners at diagnosis in 1964–71 and 1989–96 for respiratory (RES), hepatocellular (HCC), oesophageal (OES) and bladder cancers (BLD).

	RES		HCC		OES		BLD
Age (years)	1964–71a	1989–96	1964–71a	1989–96	1964–71a	1989–96	1964–71a	1989–96
15–24	1.4	0.0	17.9	0.9	0.6	0.0	7.7	0.0
25–34	9.6	2.5	34.8	14.3	8.0	5.1	20.0	4.8
35–44	27.4	18.3	21.3	18.8	26.5	17.2	29.2	19.0
45–54	31.5	39.8	17.3	24.7	42.6	32.8	30.7	9.5
55+	19.2	17.8	4.1	14.3	18.6	20.7	10.8	19.0
NKN	10.9	21.6	4.6	26.9	3.7	24.2	1.6	47.6
Median age	47.0	49.6	33.6	46.0	48.0	49.8	42.4	47.5

^aAfter Harington et al (1975); NKN=Age not known.