Table 1

Summary statistics for study subjects

	Ceramics workers (n=107)		Farmers not sheep dippers (n=53)		Sheep dippers (n=612)
Variable	n	(%)	n	(%)	n	(%)
Country of residence (n (%)):
Scotland	36	34	46	87	344	56
England	71	66	7	13	268	44
Age (y):
15–24	11	10.3	9	17.0	35	5.7
25–34	30	28.0	15	28.3	131	21.4
35–44	40	37.4	7	13.2	142	23.2
45–54	19	17.8	17	32.1	149	24.3
55–64	7	6.5	5	9.4	113	18.5
65–74	0	0.0	0	0.0	37	6.0
⩾75	0	0.0	0	0.0	5	0.8
Mean (SD)	38.6 (10.2)		39.2 (12.7)		45.1 (13.4)
Sex (n (%)):
Male	104	97.2	50	94.3	524	85.6
Female	3	2.8	3	5.7	88	14.4
Alcohol (units/week, (n (%))):
Non-drinker	2	1.9	3	5.7	41	6.7
⩽5	16	15.0	22	41.5	293	47.9
6–15	35	32.7	16	30.2	176	28.8
16–30	34	31.8	10	18.9	78	12.7
31–45	14	13.1	1	1.9	19	3.1
⩾45	6	5.6	1	1.9	5	0.8
Education (highest level (n (%))):
No certificates	46	43.0	19	35.8	226	36.9
O level/A level^1-150	36	33.7	16	30.2	162	26.5
Tertiary	25	23.5	18	34.0	224	36.6

↵1-150 Includes standard/higher grade equivalents for Scotland.