Table 5. A summary of risk estimates for female breast cancer in semiconductor industry.

Population	Measure	Attributes	Risk estimates (95% CI)	Source
Mortality
US IBM	SMR	Total	95 (80–112)	Beall et al.50
		Employed for 5+ years	100 (73–134)
		Employed for 10+ years	102 (65–154)
	PMR	Total	137 (125–150)	Clapp53
	PCMR	Total	115 (106–125)
		Manufacturing	97 (79–120)
US SIA	SMR	Total	92 (75–112)	Boice et al.52
		Non-fabrication workers	109 (89–136)
		Fabrication workers	65 (42–95)
UK West Midlands	SMR	Total	47 (25–81)	Nichols and Sorahan58
UK NSUK	SMR	Total	104 (50–192)	Darnton et al.55
Taiwan RCA	SMR	Total	114 (85–151)	Chang et al.61
		Employed for 1–4 years	125 (n.a.)
		Employed for 5+ years	132 (n.a.)
Korea	SMR	Total	84 (10–302)	Lee et al.15
Incidence
US IBM	SIR	East Fishkill, total	104 (89–120)	Bender et al.51
		East Fishkill, employed for 5+ years	114 (88–145)
		East Fishkill, unexposed	115 (89–145)
		East Fishkill, exposed	98 (81–117)
		East Fishkill, exposed for 5+ years	94 (65–133)
		San Jose, total	102 (87–119)
		San Jose, employed for 5+ years	94 (69–125)
		San Jose, unexposed	109 (87–136)
		San Jose, exposed	97 (77–121)
		San Jose, exposed for 5+ years	80 (48–125)
UK West Midlands	SIR	Total	78 (59–102)	Nichols and Sorahan58
UK NSUK	SIR	Total	123 (90–163)	Darnton et al.55
		Fabrication workers	135 (96–184)
		Non-fabrication workers	81 (33–167)
Taiwan RCA	SIR	Total	109 (96–122)	Sung et al.63
		Employed for 10+ years	168 (111–242)
		Hired before 1974	138 (111–170)
		Hired after 1974	99 (85–114)
Korea	SIR	Total	77 (44–126)	Lee et al.15

SMR: standardized mortality ratio; SIR: standardized incidence ratio; PMR: proportionate mortality ratio; PCMR: proportionate cancer mortality ratio; CI: confidence interval.