. Author manuscript; available in PMC: 2009 Sep 1.

Published in final edited form as: J Behav Ther Exp Psychiatry. 2007 Aug 12;39(3):292–304. doi: 10.1016/j.jbtep.2007.08.002

Table 1.

Intercorrelations, Means and Standard Deviations among the Primary Variables of Interest at Baseline Assessment

	1	2	3	4	5	6	7	8	9	10	11	12	M	SD

1. API total	-												13.1	8.5
2. PDSS (PA frequency)	.10 ^ns	-											.1	.3
3. IES-R	.41	.02 ^ns	-										5.3	1.9
4. PSWQ	.50	.08 ^ns	.48	-									43.9	14.4
5. SIAS	.51	.10	.39	.52	-								36.0	11.8
6. STAI	.32	.40	.40	.43	.38	-							44.6	4.5
7. Family History of Anxiety	.18	.07	.17	.22	.19	.06 ^ns	-						.3	.5
8. API (Pre CO₂; Highest Fear)	.25	−.01 ^ns	.17	.13	.12	.11	.10 ^ns	-					7.4	9.5
9. API (Pre CO₂; Desire to Escape)	.23	.01 ^ns	.01 ^ns	.14	.17	.09 ^ns	.04 ^ns	.56	-				8.2	13.0
10. API (Pre CO₂; Feeling Immobile)	.33	−.02 ^ns	.15	.14	.24	.12	.10 ^ns	.51	.58	-			7.2	13.3
11. API (Post CO₂; Highest Fear)	.27	.01 ^ns	.01	.20	.14	.16	.07 ^ns	.51	.43	.40	-		18.2	19.8
12. API (Post CO₂; Desire to Escape)	.26	.05 ^ns	.12	.20	.15	.14	.02 ^ns	.42	.57	.42	.83	-	17.7	22.2
13. API (Post CO₂; Feeling Immobile)	.36	.04 ^ns	.16	.19	.29	.22	.06 ^ns	.42	.47	.62	.67	.74	13.7	19.4

Note. N = range from 380 – 404. All ps < .05 except when noted nonsignificant (ns). API = Acute Panic Inventory; PDSS = Panic Disorder Severity Scale (Panic Attack Frequency); IES-R = Impact of Events Scale-Revised; PSWQ= Penn State Worry Questionnaire; SIAS = Social Interaction Anxiety Scale; STAI = Spielberger Trait Anxiety.