The trajectory of symptom burden in exposed and unexposed survivors of a major avalanche disaster: a 30 year long-term follow-up study.

BACKGROUND: Limited research exists concerning the long-term effects of avalanches on survivors' mental health beyond the first years after the accident. The aims of this study were to describe and evaluate possible differences in long-term mental health symptoms after a major avalanche disaster between exposed and unexposed soldiers using a longitudinal design. METHOD: Present mental health symptoms were examined among avalanche exposed (n = 12) and unexposed (n = 9) soldiers by PTSS-10, IES-15 and STAI-12 in four waves (1986-1987 and 2016). RESULTS: Binary logistic regression revealed that the odds to score above the cut-off were significantly lower for both groups after one year compared to baseline for PTSS-10 (p = 0.018) and significantly lower after 30 days compared to baseline for IES-15 (p = 0.005). Data did not reveal significant differences between the exposed and unexposed groups regarding adjusted PTSS-10, IES-15 or STAI-12 mean scores compared. Linear mixed model-analyses revealed significant effects of time. The adjusted mean scores declined over time for both groups: PTSS-10 (p = 0.001), IES-15 (p = 0.026) and STAI-12 (p = 0.001), and the time trajectories for PTSS-10 were significantly different between the groups (p = 0.013). Although not significant (all p > 0.05), results indicated that a larger proportion of soldiers in the exposed group experienced posttraumatic stress symptoms (5/12) (PTSS-10 score ≥ 4) and distress symptoms (6/12) (IES-15 score ≥ 26) above cut-off points, 30 years post-disaster. CONCLUSIONS: The course of mental health symptoms may persist, and even increase, in selected and trained military personnel 30 years after exposure to a natural disaster. These findings may be of great importance for health authorities planning appropriate follow-up.

Sleep quality problems three decades post-disaster.

STUDY OBJECTIVES: Sleep quality problems are a core feature of posttraumatic stress disorder (PTSD). The aims of this study were to describe and evaluate possible differences regarding sleep quality problems and hyperarousal symptoms between exposed and unexposed survivors after an avalanche. Further, we wanted to describe any association between avalanche exposure and survivors' self-reported sleep quality problems and posttraumatic stress (disorder) symptoms with and without hyperarousal symptoms. METHOD: The participants were soldiers who had survived an avalanche (n = 12) and a sample of unexposed soldiers (n = 9). Subjective sleep quality problems and posttraumatic stress (disorder) symptoms were assessed using well-validated measures: Pittsburgh Sleep Quality Index (PSQI), Posttraumatic Symptom Scale-10 (PTSS-10), and Impact of Event Scale-15 (IES-15). Hyperarousal symptoms were assessed using a 3-item hyperarousal-index from PTSS-10 (PTSS-10/Hyp index). RESULTS: No significant difference in sleep quality problems was revealed between the exposed and unexposed groups. There was a significant association between those with PTSS-10 ≥ 4 combined with hyperarousal symptoms and sleep quality problems (p = .046), 30 years after the avalanche. Likewise, no significant associations was revaled between those with sleep quality problems and IES-15 ≥ 26 with and without hyperarousal. Binary logistic regression showed that those with sleep quality problems (PSQI > 5) 30 years post-disaster, had 2.5 times greater odds (OR = 2.49, 95%CI [0.95-6.55], p = .064) of having hyperarousal symptoms during the whole follow-up period compared to those without sleep quality problems. CONCLUSION: Our findings may indicate an association between sleep quality problems (PSQI > 5) and hyperarousal symptoms in soldiers with scores above cut-off point for posttraumatic stress (disorder) symptoms.