Table 1.

Descriptive and Zero-Order Relations Among Theoretically Relevant Variables

Variable	1	2	3	4	5	6	Mean or % (SD)	Observed range
1. Cigs/day	1	.08	−.12	.10	.05	.09	15.64 (7.07)	10.0–50.0
2. ASI		1	.32**	.53***	.00	.09	20.88 (12.59)	0.0–54.0
3. PA			1	.25*	.09	−.12	42.2% yes
4. MWS				1	.01	.14	8.88 (4.93)	0.0–20.5
5. HR diff					1	.25*	13.48 (14.20)	−47.75–47.89
6. Resp diff						1	7.74 (7.16)	−21.23–18.89

Note. Cigs/day = smoking rate from Smoking History Questionnaire; ASI = Anxiety Sensitivity Index total; PA = panic attack status during hyperventilation challenge (yes/no); MWS = Minnesota Nicotine Withdrawal Scale; HR diff = heart rate difference between prechallenge and postchallenge (beats/minute); Resp diff = respiration rate difference between prechallenge and postchallenge (breaths/ minute).

^*p < .05.

^**p < .01.

^***p < .001.