Table 3.

Hierarchical linear regression analysis for the prediction of number of clinical post-traumatic stress disorder symptoms (n = 71)

	Variable	B	SE B	ß	R2	∆R2	Sr2
Step 1					0.083*
	Trauma history	1.74	0.70	0.29*			0.08
Step 2					0.398	0.315***
	Trauma history	1.20	0.58	0.20*			0.04
	Peritraumatic reactions	2.02	0.34	0.57***			0.32
Step 3					0.520	0.122**
	Trauma history	0.40	0.57	0.07			0.00
	Peritraumatic reactions	1.44	0.35	0.41***			0.12
	Negative social support	1.67	0.96	0.16			0.02
	Pain	0.02	0.03	0.06			0.00
	Intolerance of uncertainty	7.20	1.91	0.37***			0.10

^*P < .05.

^**P < .01.

^***P < .001.