#

Author, year, country

# Of event

Sample size

1

Bener et al., 2012, Qatar

76

431

2

Hawamdeh et al., 2013, UAE

45

70

3

Al Hayek et al., 2013, KSA

3

33

4

Sulaiman et al., 2010, UAE

28

227

5

Sweileh et al., 2014 Palestine

77

164

6

Al-Amer et al., 2011, Jordan

86

367

7

Bensbaa et al., 2014 (Moroco)

31

93

8

ElMahalli, 2015, KSA

82

141

9

Gemeay, 2015, KSA

29

44