Study groups

Control group I
n=25

PIU-group
n=25

Alcohol group
n=25

Control group II
n=25

Mean/n

SD/%

Mean/n

SD/%

Mean/n

SD/%

Mean/n

SD/%

Age (T-test)

M=29.5

SD=9.6

M=29.4**

SD=10.8

M=41.4

SD=9.0

M=39.6

SD=10.3

Female (Pearson Chi-Square)

6

24%

6

24%

8

32%

8

32%

Male (Pearson Chi-Square)

19

76%

19

76%

17

68%

17

68%

college degree (Pearson Chi-Square)

10

40%

12*

48%

5

20%

5

20%

Occupied (Pearson Chi-Square)

20*

80%

11

44%

8***

36%

22

88%

Single (Pearson Chi-Square)

9

36%

13

52%

13*

52%

4

16%

without children (Pearson Chi-Square)

18

72%

19*

76%

14

56%

14

56%

* The marking of a statistically significant difference refers to a comparison with the next column/group.
(*p<0.05; **p<0.01; ***p<0.001)

Table 1: Socio-demographic data of the four study groups.
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