Prevalence of post-traumatic stress disorder in students 23 months after tsunami.
OBJECTIVE
To study the prevalence of post-traumatic stress disorder (PTSD) in the 4th-9th grade students in an affected school 23 months after tsunami.


METHODS
Two-stage screening procedure was used in a diagnostic study designed to identify post-traumatic stress disorder in the 4th-9th grade students in a school in Takaupa district, Phang Nga province, 23 months after the 2004 tsunami. Impact of Events Scale (IES) was used as a screening questionnaire in the first stage. In the second stage, the students were assessed by a psychiatrist to identify PTSD according to DSM-IV criteria. SPSS 10.0, inferential statistics and Chi-square test were used to analyze the data.


RESULTS
A total of 436 students participated in the study. Forty of them were diagnosed with PTSD. The prevalence of PTSD was 15.1%. The sensitivity, specificity and negative predictive value of IES were 0.75, 0.54 and 0.92 respectively.


CONCLUSIONS
The prevalence of PTSD in students in a school 23 months after tsunami was 15.1%.
Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand.
Panom
P
Ketumarn
Nantawat
N
Sitdhiraksa
Natthorn
N
Pithayaratsathien
Vinadda
V
Piyasilpa
Rattanothai
R
Plubrukan
Hattaya
H
Dumrongphol
Sarinee
S
Rungsri
Sirina
S
Satthapisit
Chanvit
C
Pornnoppadol
Sucheera
S
Phattharayuttawat