Table 1. Characteristics of children who experienced the 2011 Japan Earthquake and Tsunami.

Items			N = 11639
Gender	Male		5939	(51.0%)
	Female		5700	(49.0%)
Age at the time of the disaster (y) (Mean)			10.9	(SD = 2.7)
PTSSC-15 score (Mean)			20.5	(SD = 14.5)
PTSSC-15 score at the cut-off value or higher (23 points)			4956	(42.6%)
House damage	No		6986	(60.0%)
	Yes	Total collapse	2243	(19.3%)
		Half collapse	2354	(20.2%)
		Total	4597	(39.5%)
	Unknown		56	(0.5%)
Evacuation experience	No		8228	(70.7%)
	Yes	Currently living in evacuation center	90	(0.8%)
		Used to live in evacuation center	2845	(24.4%)
		Living in temporary housing	976	(8.4%)
		Used to live in temporary housing	51	(0.4%)
		Evacuation experience at least once	3248	(27.9%)
	Unknown		163	(1.4%)
Bereavement experience	No		9241	(79.4%)
	Yes	Father	71	(0.6%)
		Mother	66	(0.6%)
		Brothers and sisters	44	(0.4%)
		Grandfather and grandmother	355	(3.1%)
		Classmates	1498	(12.9%)
		Teacher in charge	32	(0.3%)
		Others	270	(2.3%)
		At least one bereavement experience	2103	(18.1%)
	Unknown		295	(2.5%)

M, mean; SD, standard deviation; N, number of cases.