Table 4. Average PTSSC-15 score (grade & gender & evacuation experience).

Grade Group	Gender	Evacuation experience							F	p value
		Absent			Present
		M	SD	N	M	SD	N
Kindergartners								Gender×Evacuation	0.1643	ns
	Male	14.73	12.58	105	19.14	11.99	14	Evacuationexperience	1.791	ns
	Female	15.21	12.11	112	17.57	16.68	14	Gender	0.04644	ns
1st – 3rd gradeelementary school students								Gender×Evacuation	0.07718	ns
	Male	16.45	12.30	1401	20.25	13.58	436	Evacuationexperience	52.75	<0.0001
	Female	17.39	12.50	1311	20.91	13.68	395	Gender	2.52	ns
4th – 6th gradeelementary school students								Gender×Evacuation	0.0115	ns
	Male	19.36	14.16	1375	20.30	14.60	557	Evacuationexperience	3.763	0.0525
	Female	21.35	14.66	1357	22.40	14.94	577	Gender	15.9	<0.0001
Junior highschool students								Gender×Evacuation	0.2867	ns
	Male	20.91	14.91	1342	22.25	14.63	624	Evacuationexperience	9.597	0.0020
	Female	25.18	15.38	1225	27.08	15.86	631	Gender	75.7	<0.0001

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