Table 3.

Examples of Scandinavian registers

		Reference
Type	Information	Sweden	Norway	Denmark
Medical Birth Register (MBR)	Data on place of birth, birth weight, mother’s parity, mother’s age, type of delivery, Apgar scores, obstetrical complications (e.g., eclampsia).	(O. Axelsson, 2003)	(Langhoff-Roos et al., 2014)	(Knudsen & Olsen, 1998)
National Patient Register (NPR)	Information on treatment at all hospitals, including both in- and outpatient psychiatric contacts (e.g., diagnostic and treatment codes).	(Ludvigsson et al., 2011)	www.npr.no	(Lynge, Sandegaard, & Rebolj, 2011), (Andersen, Olivarius Nde, & Krasnik, 2011)
Comprehensive statistics (CS)	Exhaustive information on sociodemographic characteristics (e.g., living situation, marital status, education levels, employment, income).	www.scb.se	www.ssb.no	(Baadsgaard & Quitzau, 2011; Petersson, Baadsgaard, & Thygesen, 2011)
Prescription drug register (PDR)	Individual-level data for all prescriptions dispensed for in- and out-patients (e.g. variables at level of drug user, prescriber, pharmacy).	(Wettermark et al., 2007)	www.norpd.no	(Kildemoes, Sorensen, & Hallas, 2011)
Cause of Death Register (CDR)	Information on mortality from death certificates (e.g., cause of death according to ICD codes).	(Johansson & Westerling, 2000)	www.fhi.no	(Helweg-Larsen, 2011; Juel & Helweg-Larsen, 1999)