Study of two cohorts of workers exposed to methyl methacrylate in acrylic sheet production

		Predicted^4-151			Actual 1980–97
		1949–61	1962–74		1975–95	Median	n	25th–75th Percentile
Orchard mill:
Syrup room	45	30	H	16.3	41	11.6–24.1
Casting chamber	30	H	H	13.0	85	8.5–19.1
Shift cleaner	100	80	H	18.5	6	11.5–24.0
PEV	—	35	35	24.2	37	12.1–37.4
Colour section operator	30	H	H	19.0	41	8.0–43.2
Glass section operator	H	M	M	15.3	10	9.3–26.0
Trucks or ovens	M	M	M	3.3	15	2.1–5.1
Inspection	M	M	M	0.8	9	0.7–1.1
Britannia mill:	1961–95
Syrup room	H			11.6	39	9.4–19.9
Casting room	H			12.5	63	9.2–27.5
Cement making	M			4.0	25	2.2–6.9
Ovens	M			4.8	8	3.0–18.1
Inspection	M			5.4	9	2.3–16.3
Block making	M			6.5	8	5.8–12.6