en: A total of 301 students from previous study, as well as new students participated in this cross-sectional study and out of them, 258 participants were included in this thesis.
is: Um þversniðsrannsókn er að ræða og voru þátttakendur 301 nemendur úr fyrri rannsókn, ásamt nýjum nemendum en 258 nemendur voru í eftirfarandi rannsókn.