Adult insecure attachment styles and suicidality: A meta-analysis

Insecure attachment styles have been linked to an increased risk for suicidality, functioning as a distal risk factor for suicide behaviors in adulthood. Studies on the subject are numerous, but heterogeneous in methodology. This study aimed to sensibly group study findings and quantify the magnitude of this relationship. We performed a systematic literature search to select studies investigating insecure adult attachment styles and suicidal ideation and attempt, and present quantitative data that could be pooled into a meta-analysis. Six random-effect meta-analyses were performed, comprising 47 studies with 50,214 individuals. A small effect size association was found for the relationship between suicidal ideation and insecure attachment styles (anxious, avoidant, and fearful); similar findings were found for the relationship between suicide attempt and insecure attachment (Pearson's r ranged from 0.16 to 0.26, all ps <0.05). The type of attachment measure moderated the association of suicidal ideation with anxious and avoidant attachment. This review has been preregistered at The International Prospective Register of Systematic Reviews (PROSPERO) - Registration number CRD42023401459.