Age

PDFS-present

PDFS-absent

Total

12 - 19

1

7

8

20 - 39

6

26

32

40 - 69

2

10

12

Total

9 (17.3%)

43 (82.7%)

52 (100%)

Sex

Male

5

16

21

Female

4

27

31

Total

9 (17.3%)

43 (82.7%)

52 (100%)