Table 3.

Incidence of mesothelioma and MN of the lung in 71 185 male UK Electricity Generation and Transmission workers, by year of hire, period from hire, period from leaving employment, duration of employment, industry sector and type of work, 1973–2015

	Mesothelioma				MN of the lung
	Obs	Exp	SRR	95% CI	Obs	Exp	SRR	95% CI
Year of hire
1926–59	311	65.9	472	422–527	999	1330.8	75	71–80
1960–69	334	97.1	344	309–382	1297	1587.4	82	77–86
1970–82	118	71.0	166	138–198	866	991.1	87	82–93
Test for trend			P = ***				P = ***
Period from hire (years)
0–19	29	14.7	197	135–280	500	548.4	91	83–99
20–29	72	38.5	187	147–234	741	847.0	87	81–94
30–39	221	72.6	304	266–347	942	1142.2	82	77–88
≥40	441	108.2	408	371–447	979	1371.7	81	67–76
Test for trend			P = ***				P = ***
Period from leaving employment (years)
<10a	125	44.6	280	234–333	1125	1420.5	79	75–84
10–19	282	80.6	350	311–393	1042	1300.8	80	75–85
20–29	267	80.2	333	295–375	739	904.8	82	76–88
≥30	89	28.5	312	252–383	256	283.2	90	80–102
Test for trend			P = NS				P = NS
Duration of employment (years)
<10	70	41.3	170	133–213	644	658.3	98	90–106
10–19	228	77.3	295	259–335	1191	1336.1	89	84–94
≥20	465	115.4	403	368–441	1327	1914.9	69	66–73
Test for trend			P = ***				P = ***
Industry sector
Power stations	616	160.9	383	354–414	2416	2690.2	90	86–93
Transmission	20	12.2	164	103–249	119	190.5	62	52–74
Non-operational	92	52.0	177	143–216	384	803.1	48	43–53
Unclassifiableb	35	8.9	393	278–541	243	225.4	108	95–122
Test for heterogeneity			P = ***				P = ***
Type of work
Managers	10	2.9	345	175–615	17	56.2	30	18–47
Engineers	209	66.2	316	275–361	381	940.2	41	37–45
Admin, clerical	7	13.5	52	23–103	138	245.0	56	48–56
Industrial	486	141.3	344	314–376	2356	2421.8	97	93–101
Building, constr.	19	2.4	792	491–1213	45	46.1	98	72–130
Not known	32	7.6	421	293–587	225	199.9	113	99–128
Test for heterogeneity			P = ***				P = ***
Total	763	234.0	326	304–350	3162	3909.3	81	78–84

NS, not significant.

^aIncludes still employed.

^bUnclassifiable work history or no work history.

***P < 0.001.