Fig. 1.

Study design and study population. All data were obtained from Danish National Administrative registries available through Statistics Denmark. Selective serotonin reuptake inhibitor (SSRI) intake was defined as pharmacy pickups with sufficient daily dispensing to cover a period of at least two days before and 14 days after a positive SARS-CoV-2 PCR test. The total number of tests included subjects aged <18 years old. According to Statistics Denmark, the Danish population was 5.82 million at the beginning of the study period and 5.85 million at the end of the study period. Of these individuals, 4.67 million were ≥18 years old. Study participants could only enter the study once, and only the first positive test was used.