Variable

Modality

Stress resistance test category

Total

Khi-2

p-value

Low

Moderate

High

Gender

Male

7

38

5

50

0.39

0.82(ns)

Female

7

36

7

50

Total

14

74

12

100

Age

<30 ans

11

47

5

63

3.84

0.05*

>30 ans

3

27

7

37

Total

14

74

12

100

Socio-economic level

Average

11

52

12

75

7.85

0.02*

Good

3

22

0

25

Total

14

74

12

100