Standardized effect of sibling’s death on stroke mortality.

Numbers are mortality risk ratios (with 95% confidence intervals) between exposed and unexposed index persons, i.e., the ratio of the death risk of persons with a deceased sibling and the death risk of persons with no deceased sibling, adjusted for effects of all control variables. Control variables included in the estimations are age, calendar year, socioeconomic status, marital status, number of children, number of siblings and region of residence. In the models where we distinguish between external and not external cause of sibling’s death, the former refers to ICD 8 codes E800–E999, ICD 9 codes E807–E999, and ICD 10 codes V01-Y98, and the latter to all other codes. In the models where we distinguish between stroke and not stroke as the cause of sibling’s death, the former refers to ICD 8 and ICD 9 codes 430–438, and ICD 10 codes I60–I69, and the latter to all other codes. All models have been estimated separately for men and women.