Table 5.

Designs of the reviewed studies.

Design	Study
Cross-sectional	[1,4,11,12,18,19,23,25-28,30,34,35,37,38,41,42,44,45]
Experimental	[13,16,20,31,32,43]
Longitudinal	[21,40]
Exploratory	[22,24,36,39]