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Purpose: The Swedish National Quality Register for bipolar affective disorder, BipoläR, was established in 2004 to provide nationwide indicators for quality assessment and development in the clinical care of individuals with bipolar spectrum disorder. An ancillary aim was to provide data for bipolar disorder research., Participants: Inclusion criteria for registration in BipoläR is a diagnosis of bipolar spectrum disorder (ICD codes: F25.0, F30.1-F30.2, F30.8-F31.9, F34.0) and treatment at an outpatient clinic in Sweden. BipoläR collects data from baseline and annual follow-up visits throughout Sweden. Data is collected using questionnaires administered by healthcare staff. The questions cover sociodemographic, diagnostic, treatment, outcomes and patient reported outcome variables. The register currently includes 39 583 individual patients with a total of 75 423 baseline and follow-up records., Findings to Date: Data from BipoläR has been used in several peer-reviewed publications. Studies have provided knowledge on effectiveness, side effects and use of pharmacological and psychological treatment in bipolar disorder. In addition, findings on the diagnosis of bipolar disorder, risk factors for attempted and completed suicide and health economics have been reported. The Swedish Bipolar Collection project has contributed to a large number of published studies and provides important information on the genetic architecture of bipolar disorder, the impact of genetic variation on disease characteristics and treatment outcome., Future Plans: Data collection is ongoing with no fixed end date. Currently, approximately 5000 new registrations are added each year. Cohort data are available via a formalised request procedure from Centre of Registers Västra Götaland (e-mail: registercentrum@vgregion.se). Data requests for research purposes require an entity responsible for the research and an ethical approval., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

This placebo-controlled, double-blind, 1-year pilot study aimed at investigating possible clinical advantages of combining initial light therapy with the selective serotonin reuptake inhibitor (SSRI) citalopram as well as the effects of continuous long-term administration of this drug in patients with seasonal affective disorder (SAD). Eight physically healthy women who met the DSM-III-R criteria for SAD were included in the study. Four women were randomized to the citalopram group receiving 40 mg citalopram daily from the first of 10 light treatment days and throughout the 1-year study. The remaining four women were allocated to the placebo group using the same double-blind repeated measures design. The clinical outcome was measured by using three versions of the Comprehensive Psychopathological Rating Scale (CPRS) and Visual Analog Scales (VAS), respectively. Taking the initial rating scores into account in covariance analyses, no statistically significant group difference was found during the light treatment period. However, during the follow-up period the full version of the CPRS and the self-rating version of CPRS and the VAS-scales for global condition and depressed mood were statistically significantly lower in the citalopram group compared with the placebo group. Thus, in this small but carefully observed sample of SAD-patients combining initial light therapy and long-term citalopram treatment was clinically more effective over time than the placebo combination. Our findings support the notion that light therapy with concomitant and continued SSRI (citalopram) treatment is a useful strategy to achieve beneficial long-term effects in patients with the SAD syndrome.