Differences in symptoms of anxiety and depression among out-of-hospital cardiac arrest survivors and their relatives, paired results from the DANCAS survey

Abstract Background It is well known that out-of-hospital cardiac arrest (OHCA) survivors, as well as their relatives, struggle with symptoms of anxiety and depression, but less is known about the potential differences in paired outcomes. Purpose To describe differences in symptoms of anxiety and depression among OHCA survivors and their relatives (paired) and to investigate characteristics associated with these symptoms among both groups. Methods A national cross-sectional survey (DANCAS) was conducted with OHCA survivors combined with a survey for their closest relatives. The Hospital Anxiety and Depression Scale (HADS) was included in both surveys. Paired t-tests were used to examine potential differences in HADS mean scores among survivors and relatives. Associations between characteristics (demographic and other self-reported outcomes) and symptoms of anxiety (HADS-A ≥8) and depression (HADS-D ≥8) were examined using multivariable logistic regression models, presented as odds ratios (OR) with 95% confidence intervals (CI), adjusted for potential confounders. Results In total, 526 pairs of OHCA survivors and their relatives both responded, with 447 (85%) of the survivors being men, a median age of 67 years (IQR 59-75) and 462 (88%) of the relatives being women with a median age of 64 years (IQR 55-70). Most relatives (85%) were spouses or unmarried partners. In the paired analyses, relatives had significantly higher scores of anxiety compared to survivors (mean 5.6 SD 4.0 vs 3.5 SD 3.8; p<0.001). On the contrary, survivors had significantly worse scores of depression (mean 3.1 SD 2.8 vs 2.4 SD 3.2; p>0.001). Several characteristics (demographic and self-reported) were associated with symptoms of anxiety and depression among both survivors and relatives, Table 1 & 2. Conclusion Following OHCA, relatives report worse scores of anxiety while, in contrast, survivors report worse scores of depression, indicating psychological interventions should be tailored differently for the two groups. Further investigation of the reasons for these findings are needed, including whether fatigue might be a symptom of depression or a confounder.