As part of her PhD thesis, Sandra Rogne has published her first article, All-cause mortality around the anniversary of a sibling’s death: findings from Swedish National Register Data, co-authored with Alessandra Grotta, Can Liu, Lisa Berg, Jan Saarela, Ichiro Kawachi, Ayako Hiyoshi, and Mikael Rostila.
Death anniversaries may trigger stress responses that negatively affect health in bereaved individuals. Little is known about such reactions after adult sibling loss. This study examined whether mortality risk increases around the anniversary of a sibling’s death.
Using Swedish national register data (1990-2016), the study authors conducted a time-stratified case-crossover study including 12 789 adults who experienced sibling loss and later died. Conditional logistic regression estimated associations between mortality and death anniversaries (including pre-anniversary and post-anniversary periods), adjusting for time-invariant confounders. Analyses were stratified by the bereaved’s sex and age, the sibling’s sex, sibling order, and whether ≥1 parent was alive at the bereaved’s death.
Among women, mortality risk was lower on the anniversary date (OR, 0.44; 95% CI, 0.21-0.93), and in the period from 1 day before and up to the anniversary date for women who lost a younger or same-age sibling (OR, 0.45; 95% CI, 0.20-1.00). In contrast, men bereaved before age 50 years had a heightened risk in the period ranging from 12 days before and up to the anniversary (OR, 1.40; 95 % CI, 1.05-1.86).
Overall, sibling-death anniversaries were not associated with elevated mortality, though observed sex- and age-specific patterns merit further investigation.
Read more: https://doi.org/10.1093/aje/kwaf213