Of 120 patients completing a five week inpatient treatment at Reykjalundur rehabilitation centre from September 2007 to December 2008, 90 (75%) consented to participation at 3-4 year follow-up and were included in the study.
Af þeim 120 einstaklingum sem luku fimm vikna dagdeildarmeðferð á Reykjalundi á tímabilinu frá september 2007 til desember 2008 samþykktu 90 einstaklingar þátttöku (75%) í eftirfylgdarrannsókn 3-4 árum síðar.