Participants
depression, PTSD, psychotic disorder, anxiety
Participants were recruited primarily through social media networks and enrolled in the Grief COVID platform between December 22, 2020, and November 17, 2021. Participants were included if they met the following criteria:≥18 years of age; internet access; a valid email address; basic digital skills; fluency in Spanish; experience of the loss of a loved one within the last 6 months; and reported symptoms of depression, anxiety, or stress (ie, total scores of the scales >0). Participants were excluded if, at the time of the study, they met one or more of the following criteria: they had a diagnosis of a psychotic disorder; >6 months had passed since the loss of their loved one; they received psychological and pharmacological treatment at the time of the study; and they had a moderate to a high score on the suicide risk scale, a recent suicide attempt (<3 months before the assessment), or a diagnosis of PTSD. Contact information for external psychological services was provided on the platform, giving preference to the services that were free of charge.