The research is based on quantitative methodology and the research data was collected from The National University Hospital that bases on an international mental health evaluation system called InterRAI Mental Health (InterRAI MH).
Rannsóknin byggir á megindlegri aðferðafræði þar sem rannsóknargögnum var aflað úr gagnagrunni Landspítala sem byggir á alþjóðlegu geðþjónustumatskerfi InterRAI Mental Health (InterRAI MH).