Table 3.

Distribution of the population studied based on sex, age and job length of service

	Sample size	Woman	Man	Age median [range]	Job length of service (years) [range]
Controls	44	21	23	41 [21–59]	9.5 [<1–22]
Cashiers	90	69	21	32 [20–60]	6 [<1–41]