The Development Trajectory Of Post-traumatic Stress Disorder Symptoms In People Affected By Typhoon

Objective: The purpose of this study is to understand the trend of PTSD symptoms in typhoon-affected people through longitudinal research,and investigate the development trajectory of PTSD symptoms in typhoon-affected people,and test whether the mental distress arousal symptom cluster has a predictive effect on other PTSD symptom clusters.This research is helpful to understand the changes in people’s psychological trauma after typhoon disasters,and in-depth understanding of the role of mental pain symptom clusters in PTSD,and to formulate emergency plans and provide targeted advice for public emergencies in China,especially natural disasters.Methods: This study used questionnaires as the main method to collect data in a village near a certain typhoon landing site in Hainan Province.Only one adult in each household who experienced the typhoon was randomly selected for questionnaire evaluation.The questionnaires mainly included basic demographic variables questionnaire,trauma exposure questionnaire,SPSS 22.0 software was used for descriptive statistical analysis of the data,and Mplus 8.3 software was used to establish a mixed growth model to investigate the subgroup classification and population distribution of PTSD in typhoon affected people.The cross-lag model was used to verify the role of mental distress arousal symptom cluster in the development and maintenance of PTSD symptoms in typhoon affected people.Results: A total of 104 typhoon-affected people participated in the survey for three consecutive years,with an average age of 45.39±7.45 years old.Among them,80 were males,accounting for 76.9% of the total number,and 24 were women,accounting for 23.1% of the total.In the longitudinal survey for three consecutive years,The average values of PCL-5 were 13.66±14.82,12.63±13.19,10.11±8.81,and the positive detection rates of PTSD were 11.54%,9.62%,and 1.92%.The difference test results showed that there was no significant difference between income and the occurrence of PTSD in gender,age,and family.On the basis of the seven-factor PTSD mixed model,repeated measures analysis of variance was performed on each symptom cluster of PTSD.The results showed that the three scores of the anhedonia symptom cluster,externalized behavior symptom cluster and anxiety arousal symptom cluster were significantly different(P<0.05),the specific manifestation was a significant decrease over time;there was no significant difference in the three scores of intrusion into the symptom cluster,avoidance symptom cluster,negative emotional symptom cluster and mental distress arousal symptom cluster(P>0.05),and the performance was as follows: The downward trend over time was not obvious.The results of the growth hybrid model found that the PTSD trajectories of 104 typhoon-affected people were divided into 4 categories: "high risk-improvement group(8.1%)","low risk-slow improvement group(75.0%)","low risk-obvious deterioration group(9.2%)","high risk-significant improvement group(7.7%)".The results showed that there was no significant difference in the gender composition of PTSD among the four categories(P > 0.05).In terms of age,there was no significant difference in the composition ratio between the young group and the middle aged group(P > 0.05).The results of cross-lag analysis found that the T1 mental distress arousal symptom cluster had a significant predictive effect on the T2 negative emotional symptom cluster(P<0.05),and the mental distress arousal symptom cluster had no significant predictive effect on other PTSD symptom clusters across time points.(P>0.05).Conclusion: The PTSD detection rate of typhoon-affected people gradually declines over time;the trajectory of typhoon-affected people’s PTSD has significant group heterogeneity,75% of the affected people have a low-risk initial PTSD degree,but later symptoms improve slowly,with 9.2% existing The initial level is low risk,and the later PTSD degree is obviously aggravated.This part of the population should pay attention;15.8% of the typhoon-affected people have improved or significantly improved over time from the initial PTSD risk;typhoon-affected people’s PTSD category is not classified by gender and age Impact.The T1 mental distress arousal symptom cluster can significantly positively predict the T2 negative emotional symptom cluster,and the mental distress arousal symptom cluster has no significant predictive effect on other symptom clusters of PTSD across time points.