Table 2. Overview of mental health and lifestyle survey.
| Category | Age criteria | Mental health items | Method |
| Adults | Born before 1 April 1995 (ie, high school student on 11 March 2011) |
K6 (Kessler, 2003); PCL (PTSD Checklist Stressor-Specific Version, Weathers, 1994) | Self-administered |
| Children (3) | Born after 2 April 1995 but before 1 April 1998 (ie, junior high school student on 11 March 2011) |
SDQ (Strengths and Difficulties Questionnaire) | Partially self-administered |
| Children (2) | Born after 2 April 1998 but before 1 April 2004 (ie, primary school student on 11 March 2011) |
SDQ | Completed by parents |
| Children (1) | Born after 2 April 2004 but before 11 March 2011 (ie, pre-primary school on 11 March 2011) |
SDQ for children aged 4 years or older | Completed by parents |