Table 3.

Prevalence of covariates in different workload categories

	Overall		Physical workload 1985–1990
			Low		Medium–low		Medium–high		High
	n	%	n	%	n	%	n	%	n	%
Men	6328		1490		1896		1134		1808
Low paternal educationa	5169	81.7	1031	69.2	1432	75.5	1029	90.7	1677	92.8
Low intellectual performanceb	1302	20.6	167	11.2	230	12.1	352	31.0	553	30.6
Low educationc	1993	31.5	209	14.0	281	14.8	553	48.8	950	52.5
Low job control	1197	18.9	21	1.41	86	4.54	621	54.8	469	25.9
Women	5597		2286		1666		1163		482
Low paternal educationa	4543	81.2	1739	76.1	1309	78.6	1052	90.5	443	91.9
Low intellectual performanceb	1221	21.8	314	13.7	287	17.2	400	34.4	220	45.6
Low educationc	1280	22.9	373	16.3	221	13.3	397	34.1	289	60.0
Low job control	1563	27.9	97	4.2	226	13.6	818	70.3	422	87.6

^a6 years of schooling

^bScore 1–3

^c≤9 years of schooling