Table 2 Socio-demographic characteristics and exposure background of study groups

Sex (n, % of women)^a***

34 (34.0)

53 (65.4)

45 (51.7)

Age (mean in years ± SD)^b**

33.8 ± 9.4

34.6 ± 8.0

38.2 ± 8.1

Education (years of study ± SD)^b***

11.5 ± 2.7

12.5 ± 3.2

9.7 ± 2.5

Smokers (n, % yes)^a

31 (31)

29 (35.8)

32 (36.8)

Grams of alcohol per day (mean ± SD)^b

5.9 ± 11.6

5.0 ± 13.7

4.1 ±7.8

Drugs (ever tested; n and %)^a

9 (9.0)

3 (3.7)

6 (6.9)

Environmental exposure (years ± SD)^c

-

20.9 ± 14.1

24.8 ± 14.9

Occupational exposure (years ± SD)

-

-

16.3 ± 8.0

AChE inhibition (%)^d

-

25.4

23.1

BuChE inhibition (%)^d,#

-

30.2

15.4