Table 4. Associations between posttraumatic stress responses (IES-R) and independent variables: bivariate and multiple regression analyses.

	Associations with IES-R
	Daiichi (n = 831)								Daini (n = 580)
	Bivariate regression				Multiple regression				Bivariate regression				Multiple regression
	B	SE	β	p	B	SE	β	p	B	SE	β	p	B	SE	β	p
Sociodemographic factors
Age, years	0.02	0.05	0.02	0.68					0.07	0.05	0.06	0.19
Sex	4.93	2.98	0.06	0.10					6.56	2.12	0.13	0.002**	2.22	1.63	0.04	0.18
Supervisory work status	−1.26	1.86	−0.02	0.50					−1.08	1.95	−0.02	0.580
Preexisting illness(es)	3.78	1.53	0.09	0.014*	3.23	1.16	0.07	0.005**	7.78	1.73	0.18	<0.001***	6.60	1.33	0.15	<0.001***
Disaster-related experiences
Discrimination/slurs	10.5	1.53	0.23	<0.001***	5.03	1.23	0.11	<0.001***	10.6	1.85	0.23	<0.001***	4.11	1.46	0.09	0.005**
Near-death experience	6.34	1.07	0.20	<0.001***	−2.74	0.93	−0.09	0.003**	7.38	1.33	0.22	<0.001***	−1.31	1.12	−0.04	0.24
Escape from tsunami	7.61	1.78	0.15	<0.001***	2.20	1.42	0.04	0.12	8.23	1.58	0.21	<0.001***	2.59	1.28	0.07	0.044*
Witnessing of plant explosion(s)	4.31	1.12	0.13	<0.001***	−0.85	0.91	−0.03	0.35	3.43	1.83	0.08	0.062
Family member death(s)	3.44	2.32	0.05	0.14					2.13	2.61	0.03	0.41
Colleague death(s)	4.50	1.37	0.11	0.001**	0.85	1.07	0.02	0.43	−0.05	1.70	0	0.98
Major property loss	5.66	1.16	0.17	<0.001***	1.00	0.92	0.03	0.28	6.48	1.36	0.19	<0.001***
Home evacuation	3.50	1.18	0.10	0.003**	0.87	0.91	0.03	0.34	2.09	1.22	0.07	0.09	0.23	0.92	0.01	0.81
PDI total score	1.13	0.05	0.66	<0.001***	1.12	0.05	0.66	<0.001***	1.13	0.05	0.67	<0.001***	1.06	0.06	0.63	<0.001***

*p<0.05.

**p<0.01.

***p<0.001.