Primary outcome variables were mental health (i.e. psychological stress (N = 3755), depression symptoms (N = 3783)), smoking status (N = 3755), and dental behaviors (N = 4100).
Helstu útkomubreyturnar voru andleg líðan (streita (N = 3755) og þunglyndiseinkenni (N = 3783)), reykingar (N = 3755) og tannheilsa (N = 4100).