Using a representative sample of workers for constructing the SUMEX French general population based job-exposure matrix

Table 4

Distribution of the mean exposure duration and intensity per week for each row of the persulphate specific matrix among the exposed workers (percentages)

	Row 1	Row 2	Row 3
Duration
Less than 2 hours	64.0	28.6	29.5
From 2 to fewer than 10 hours	20.0	42.9	49.7
From 10 to fewer than 20 hours	8.0	25.0	14.2
20 hours or more	8.0	3.6	6.6
Total	100.0	100.0	100.0

Intensity
Low	43.5	30.8	27.6
Medium	39.1	19.2	55.3
High	17.4	50.0	14.7
Very high	0.0	0.0	2.4
Total	100.0	100.0	100.0